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-rw-r--r--drivers/awinic/aw20216.c166
-rw-r--r--drivers/awinic/aw20216.h251
-rw-r--r--drivers/chibios/spi_master.c70
-rw-r--r--drivers/chibios/spi_master.h19
-rw-r--r--drivers/lcd/st7565.c479
-rw-r--r--drivers/lcd/st7565.h215
6 files changed, 1189 insertions, 11 deletions
diff --git a/drivers/awinic/aw20216.c b/drivers/awinic/aw20216.c
new file mode 100644
index 0000000000..236c42a3cd
--- /dev/null
+++ b/drivers/awinic/aw20216.c
@@ -0,0 +1,166 @@
+/* Copyright 2021 Jasper Chan
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "aw20216.h"
+#include "spi_master.h"
+
+/* The AW20216 appears to be somewhat similar to the IS31FL743, although quite
+ * a few things are different, such as the command byte format and page ordering.
+ * The LED addresses start from 0x00 instead of 0x01.
+ */
+#define AWINIC_ID 0b1010 << 4
+
+#define AW_PAGE_FUNCTION 0x00 << 1 // PG0, Function registers
+#define AW_PAGE_PWM 0x01 << 1 // PG1, LED PWM control
+#define AW_PAGE_SCALING 0x02 << 1 // PG2, LED current scaling control
+#define AW_PAGE_PATCHOICE 0x03 << 1 // PG3, Pattern choice?
+#define AW_PAGE_PWMSCALING 0x04 << 1 // PG4, LED PWM + Scaling control?
+
+#define AW_WRITE 0
+#define AW_READ 1
+
+#define AW_REG_CONFIGURATION 0x00 // PG0
+#define AW_REG_GLOBALCURRENT 0x01 // PG0
+
+// Default value of AW_REG_CONFIGURATION
+// D7:D4 = 1011, SWSEL (SW1~SW12 active)
+// D3 = 0?, reserved (apparently this should be 1 but it doesn't seem to matter)
+// D2:D1 = 00, OSDE (open/short detection enable)
+// D0 = 0, CHIPEN (write 1 to enable LEDs when hardware enable pulled high)
+#define AW_CONFIG_DEFAULT 0b10110000
+#define AW_CHIPEN 1
+
+#ifndef AW_SCALING_MAX
+# define AW_SCALING_MAX 150
+#endif
+
+#ifndef AW_GLOBAL_CURRENT_MAX
+# define AW_GLOBAL_CURRENT_MAX 150
+#endif
+
+#ifndef DRIVER_1_CS
+# define DRIVER_1_CS B13
+#endif
+
+#ifndef DRIVER_1_EN
+# define DRIVER_1_EN C13
+#endif
+
+uint8_t g_spi_transfer_buffer[20] = {0};
+aw_led g_pwm_buffer[DRIVER_LED_TOTAL];
+bool g_pwm_buffer_update_required[DRIVER_LED_TOTAL];
+
+bool AW20216_write_register(pin_t slave_pin, uint8_t page, uint8_t reg, uint8_t data) {
+ // Do we need to call spi_stop() if this fails?
+ if (!spi_start(slave_pin, false, 0, 16)) {
+ return false;
+ }
+
+ g_spi_transfer_buffer[0] = (AWINIC_ID | page | AW_WRITE);
+ g_spi_transfer_buffer[1] = reg;
+ g_spi_transfer_buffer[2] = data;
+
+ if (spi_transmit(g_spi_transfer_buffer, 3) != SPI_STATUS_SUCCESS) {
+ spi_stop();
+ return false;
+ }
+ spi_stop();
+ return true;
+}
+
+bool AW20216_init_scaling(void) {
+ // Set constant current to the max, control brightness with PWM
+ aw_led led;
+ for (uint8_t i = 0; i < DRIVER_LED_TOTAL; i++) {
+ led = g_aw_leds[i];
+ if (led.driver == 0) {
+ AW20216_write_register(DRIVER_1_CS, AW_PAGE_SCALING, led.r, AW_SCALING_MAX);
+ AW20216_write_register(DRIVER_1_CS, AW_PAGE_SCALING, led.g, AW_SCALING_MAX);
+ AW20216_write_register(DRIVER_1_CS, AW_PAGE_SCALING, led.b, AW_SCALING_MAX);
+ }
+#ifdef DRIVER_2_CS
+ else if (led.driver == 1) {
+ AW20216_write_register(DRIVER_2_CS, AW_PAGE_SCALING, led.r, AW_SCALING_MAX);
+ AW20216_write_register(DRIVER_2_CS, AW_PAGE_SCALING, led.g, AW_SCALING_MAX);
+ AW20216_write_register(DRIVER_2_CS, AW_PAGE_SCALING, led.b, AW_SCALING_MAX);
+ }
+#endif
+ }
+ return true;
+}
+
+bool AW20216_soft_enable(void) {
+ AW20216_write_register(DRIVER_1_CS, AW_PAGE_FUNCTION, AW_REG_CONFIGURATION, AW_CONFIG_DEFAULT | AW_CHIPEN);
+#ifdef DRIVER_2_CS
+ AW20216_write_register(DRIVER_2_CS, AW_PAGE_FUNCTION, AW_REG_CONFIGURATION, AW_CONFIG_DEFAULT | AW_CHIPEN);
+#endif
+ return true;
+}
+
+void AW20216_update_pwm(int index, uint8_t red, uint8_t green, uint8_t blue) {
+ aw_led led = g_aw_leds[index];
+ if (led.driver == 0) {
+ AW20216_write_register(DRIVER_1_CS, AW_PAGE_PWM, led.r, red);
+ AW20216_write_register(DRIVER_1_CS, AW_PAGE_PWM, led.g, green);
+ AW20216_write_register(DRIVER_1_CS, AW_PAGE_PWM, led.b, blue);
+ }
+#ifdef DRIVER_2_CS
+ else if (led.driver == 1) {
+ AW20216_write_register(DRIVER_2_CS, AW_PAGE_PWM, led.r, red);
+ AW20216_write_register(DRIVER_2_CS, AW_PAGE_PWM, led.g, green);
+ AW20216_write_register(DRIVER_2_CS, AW_PAGE_PWM, led.b, blue);
+ }
+#endif
+ return;
+}
+
+void AW20216_init(void) {
+ // All LEDs should start with all scaling and PWM registers as off
+ setPinOutput(DRIVER_1_EN);
+ writePinHigh(DRIVER_1_EN);
+ AW20216_write_register(DRIVER_1_CS, AW_PAGE_FUNCTION, AW_REG_GLOBALCURRENT, AW_GLOBAL_CURRENT_MAX);
+#ifdef DRIVER_2_EN
+ setPinOutput(DRIVER_2_EN);
+ writePinHigh(DRIVER_2_EN);
+ AW20216_write_register(DRIVER_2_CS, AW_PAGE_FUNCTION, AW_REG_GLOBALCURRENT, AW_GLOBAL_CURRENT_MAX);
+#endif
+ AW20216_init_scaling();
+ AW20216_soft_enable();
+ return;
+}
+
+void AW20216_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
+ g_pwm_buffer[index].r = red;
+ g_pwm_buffer[index].g = green;
+ g_pwm_buffer[index].b = blue;
+ g_pwm_buffer_update_required[index] = true;
+ return;
+}
+void AW20216_set_color_all(uint8_t red, uint8_t green, uint8_t blue) {
+ for (uint8_t i = 0; i < DRIVER_LED_TOTAL; i++) {
+ AW20216_set_color(i, red, green, blue);
+ }
+ return;
+}
+void AW20216_update_pwm_buffers(void) {
+ for (uint8_t i = 0; i < DRIVER_LED_TOTAL; i++) {
+ if (g_pwm_buffer_update_required[i]) {
+ AW20216_update_pwm(i, g_pwm_buffer[i].r, g_pwm_buffer[i].g, g_pwm_buffer[i].b);
+ g_pwm_buffer_update_required[i] = false;
+ }
+ }
+ return;
+}
diff --git a/drivers/awinic/aw20216.h b/drivers/awinic/aw20216.h
new file mode 100644
index 0000000000..9c6865cc82
--- /dev/null
+++ b/drivers/awinic/aw20216.h
@@ -0,0 +1,251 @@
+/* Copyright 2021 Jasper Chan (Gigahawk)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+
+typedef struct aw_led {
+ uint8_t driver : 2;
+ uint8_t r;
+ uint8_t g;
+ uint8_t b;
+} aw_led;
+
+extern const aw_led g_aw_leds[DRIVER_LED_TOTAL];
+
+void AW20216_init(void);
+void AW20216_set_color(int index, uint8_t red, uint8_t green, uint8_t blue);
+void AW20216_set_color_all(uint8_t red, uint8_t green, uint8_t blue);
+void AW20216_update_pwm_buffers(void);
+
+#define CS1_SW1 0x00
+#define CS2_SW1 0x01
+#define CS3_SW1 0x02
+#define CS4_SW1 0x03
+#define CS5_SW1 0x04
+#define CS6_SW1 0x05
+#define CS7_SW1 0x06
+#define CS8_SW1 0x07
+#define CS9_SW1 0x08
+#define CS10_SW1 0x09
+#define CS11_SW1 0x0A
+#define CS12_SW1 0x0B
+#define CS13_SW1 0x0C
+#define CS14_SW1 0x0D
+#define CS15_SW1 0x0E
+#define CS16_SW1 0x0F
+#define CS17_SW1 0x10
+#define CS18_SW1 0x11
+#define CS1_SW2 0x12
+#define CS2_SW2 0x13
+#define CS3_SW2 0x14
+#define CS4_SW2 0x15
+#define CS5_SW2 0x16
+#define CS6_SW2 0x17
+#define CS7_SW2 0x18
+#define CS8_SW2 0x19
+#define CS9_SW2 0x1A
+#define CS10_SW2 0x1B
+#define CS11_SW2 0x1C
+#define CS12_SW2 0x1D
+#define CS13_SW2 0x1E
+#define CS14_SW2 0x1F
+#define CS15_SW2 0x20
+#define CS16_SW2 0x21
+#define CS17_SW2 0x22
+#define CS18_SW2 0x23
+#define CS1_SW3 0x24
+#define CS2_SW3 0x25
+#define CS3_SW3 0x26
+#define CS4_SW3 0x27
+#define CS5_SW3 0x28
+#define CS6_SW3 0x29
+#define CS7_SW3 0x2A
+#define CS8_SW3 0x2B
+#define CS9_SW3 0x2C
+#define CS10_SW3 0x2D
+#define CS11_SW3 0x2E
+#define CS12_SW3 0x2F
+#define CS13_SW3 0x30
+#define CS14_SW3 0x31
+#define CS15_SW3 0x32
+#define CS16_SW3 0x33
+#define CS17_SW3 0x34
+#define CS18_SW3 0x35
+#define CS1_SW4 0x36
+#define CS2_SW4 0x37
+#define CS3_SW4 0x38
+#define CS4_SW4 0x39
+#define CS5_SW4 0x3A
+#define CS6_SW4 0x3B
+#define CS7_SW4 0x3C
+#define CS8_SW4 0x3D
+#define CS9_SW4 0x3E
+#define CS10_SW4 0x3F
+#define CS11_SW4 0x40
+#define CS12_SW4 0x41
+#define CS13_SW4 0x42
+#define CS14_SW4 0x43
+#define CS15_SW4 0x44
+#define CS16_SW4 0x45
+#define CS17_SW4 0x46
+#define CS18_SW4 0x47
+#define CS1_SW5 0x48
+#define CS2_SW5 0x49
+#define CS3_SW5 0x4A
+#define CS4_SW5 0x4B
+#define CS5_SW5 0x4C
+#define CS6_SW5 0x4D
+#define CS7_SW5 0x4E
+#define CS8_SW5 0x4F
+#define CS9_SW5 0x50
+#define CS10_SW5 0x51
+#define CS11_SW5 0x52
+#define CS12_SW5 0x53
+#define CS13_SW5 0x54
+#define CS14_SW5 0x55
+#define CS15_SW5 0x56
+#define CS16_SW5 0x57
+#define CS17_SW5 0x58
+#define CS18_SW5 0x59
+#define CS1_SW6 0x5A
+#define CS2_SW6 0x5B
+#define CS3_SW6 0x5C
+#define CS4_SW6 0x5D
+#define CS5_SW6 0x5E
+#define CS6_SW6 0x5F
+#define CS7_SW6 0x60
+#define CS8_SW6 0x61
+#define CS9_SW6 0x62
+#define CS10_SW6 0x63
+#define CS11_SW6 0x64
+#define CS12_SW6 0x65
+#define CS13_SW6 0x66
+#define CS14_SW6 0x67
+#define CS15_SW6 0x68
+#define CS16_SW6 0x69
+#define CS17_SW6 0x6A
+#define CS18_SW6 0x6B
+#define CS1_SW7 0x6C
+#define CS2_SW7 0x6D
+#define CS3_SW7 0x6E
+#define CS4_SW7 0x6F
+#define CS5_SW7 0x70
+#define CS6_SW7 0x71
+#define CS7_SW7 0x72
+#define CS8_SW7 0x73
+#define CS9_SW7 0x74
+#define CS10_SW7 0x75
+#define CS11_SW7 0x76
+#define CS12_SW7 0x77
+#define CS13_SW7 0x78
+#define CS14_SW7 0x79
+#define CS15_SW7 0x7A
+#define CS16_SW7 0x7B
+#define CS17_SW7 0x7C
+#define CS18_SW7 0x7D
+#define CS1_SW8 0x7E
+#define CS2_SW8 0x7F
+#define CS3_SW8 0x80
+#define CS4_SW8 0x81
+#define CS5_SW8 0x82
+#define CS6_SW8 0x83
+#define CS7_SW8 0x84
+#define CS8_SW8 0x85
+#define CS9_SW8 0x86
+#define CS10_SW8 0x87
+#define CS11_SW8 0x88
+#define CS12_SW8 0x89
+#define CS13_SW8 0x8A
+#define CS14_SW8 0x8B
+#define CS15_SW8 0x8C
+#define CS16_SW8 0x8D
+#define CS17_SW8 0x8E
+#define CS18_SW8 0x8F
+#define CS1_SW9 0x90
+#define CS2_SW9 0x91
+#define CS3_SW9 0x92
+#define CS4_SW9 0x93
+#define CS5_SW9 0x94
+#define CS6_SW9 0x95
+#define CS7_SW9 0x96
+#define CS8_SW9 0x97
+#define CS9_SW9 0x98
+#define CS10_SW9 0x99
+#define CS11_SW9 0x9A
+#define CS12_SW9 0x9B
+#define CS13_SW9 0x9C
+#define CS14_SW9 0x9D
+#define CS15_SW9 0x9E
+#define CS16_SW9 0x9F
+#define CS17_SW9 0xA0
+#define CS18_SW9 0xA1
+#define CS1_SW10 0xA2
+#define CS2_SW10 0xA3
+#define CS3_SW10 0xA4
+#define CS4_SW10 0xA5
+#define CS5_SW10 0xA6
+#define CS6_SW10 0xA7
+#define CS7_SW10 0xA8
+#define CS8_SW10 0xA9
+#define CS9_SW10 0xAA
+#define CS10_SW10 0xAB
+#define CS11_SW10 0xAC
+#define CS12_SW10 0xAD
+#define CS13_SW10 0xAE
+#define CS14_SW10 0xAF
+#define CS15_SW10 0xB0
+#define CS16_SW10 0xB1
+#define CS17_SW10 0xB2
+#define CS18_SW10 0xB3
+#define CS1_SW11 0xB4
+#define CS2_SW11 0xB5
+#define CS3_SW11 0xB6
+#define CS4_SW11 0xB7
+#define CS5_SW11 0xB8
+#define CS6_SW11 0xB9
+#define CS7_SW11 0xBA
+#define CS8_SW11 0xBB
+#define CS9_SW11 0xBC
+#define CS10_SW11 0xBD
+#define CS11_SW11 0xBE
+#define CS12_SW11 0xBF
+#define CS13_SW11 0xC0
+#define CS14_SW11 0xC1
+#define CS15_SW11 0xC2
+#define CS16_SW11 0xC3
+#define CS17_SW11 0xC4
+#define CS18_SW11 0xC5
+#define CS1_SW12 0xC6
+#define CS2_SW12 0xC7
+#define CS3_SW12 0xC8
+#define CS4_SW12 0xC9
+#define CS5_SW12 0xCA
+#define CS6_SW12 0xCB
+#define CS7_SW12 0xCC
+#define CS8_SW12 0xCD
+#define CS9_SW12 0xCE
+#define CS10_SW12 0xCF
+#define CS11_SW12 0xD0
+#define CS12_SW12 0xD1
+#define CS13_SW12 0xD2
+#define CS14_SW12 0xD3
+#define CS15_SW12 0xD4
+#define CS16_SW12 0xD5
+#define CS17_SW12 0xD6
+#define CS18_SW12 0xD7
diff --git a/drivers/chibios/spi_master.c b/drivers/chibios/spi_master.c
index 4852a6eba4..28ddcbb2ba 100644
--- a/drivers/chibios/spi_master.c
+++ b/drivers/chibios/spi_master.c
@@ -18,8 +18,13 @@
#include "timer.h"
-static pin_t currentSlavePin = NO_PIN;
-static SPIConfig spiConfig = {false, NULL, 0, 0, 0, 0};
+static pin_t currentSlavePin = NO_PIN;
+
+#if defined(K20x) || defined(KL2x)
+static SPIConfig spiConfig = {NULL, 0, 0, 0};
+#else
+static SPIConfig spiConfig = {false, NULL, 0, 0, 0, 0};
+#endif
__attribute__((weak)) void spi_init(void) {
static bool is_initialised = false;
@@ -27,15 +32,15 @@ __attribute__((weak)) void spi_init(void) {
is_initialised = true;
// Try releasing special pins for a short time
- palSetPadMode(PAL_PORT(SPI_SCK_PIN), PAL_PAD(SPI_SCK_PIN), PAL_MODE_INPUT);
- palSetPadMode(PAL_PORT(SPI_MOSI_PIN), PAL_PAD(SPI_MOSI_PIN), PAL_MODE_INPUT);
- palSetPadMode(PAL_PORT(SPI_MISO_PIN), PAL_PAD(SPI_MISO_PIN), PAL_MODE_INPUT);
+ setPinInput(SPI_SCK_PIN);
+ setPinInput(SPI_MOSI_PIN);
+ setPinInput(SPI_MISO_PIN);
chThdSleepMilliseconds(10);
#if defined(USE_GPIOV1)
- palSetPadMode(PAL_PORT(SPI_SCK_PIN), PAL_PAD(SPI_SCK_PIN), PAL_MODE_STM32_ALTERNATE_PUSHPULL);
- palSetPadMode(PAL_PORT(SPI_MOSI_PIN), PAL_PAD(SPI_MOSI_PIN), PAL_MODE_STM32_ALTERNATE_PUSHPULL);
- palSetPadMode(PAL_PORT(SPI_MISO_PIN), PAL_PAD(SPI_MISO_PIN), PAL_MODE_STM32_ALTERNATE_PUSHPULL);
+ palSetPadMode(PAL_PORT(SPI_SCK_PIN), PAL_PAD(SPI_SCK_PIN), SPI_SCK_PAL_MODE);
+ palSetPadMode(PAL_PORT(SPI_MOSI_PIN), PAL_PAD(SPI_MOSI_PIN), SPI_MOSI_PAL_MODE);
+ palSetPadMode(PAL_PORT(SPI_MISO_PIN), PAL_PAD(SPI_MISO_PIN), SPI_MISO_PAL_MODE);
#else
palSetPadMode(PAL_PORT(SPI_SCK_PIN), PAL_PAD(SPI_SCK_PIN), PAL_MODE_ALTERNATE(SPI_SCK_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL | PAL_STM32_OSPEED_HIGHEST);
palSetPadMode(PAL_PORT(SPI_MOSI_PIN), PAL_PAD(SPI_MOSI_PIN), PAL_MODE_ALTERNATE(SPI_MOSI_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL | PAL_STM32_OSPEED_HIGHEST);
@@ -58,6 +63,54 @@ bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor) {
return false;
}
+#if defined(K20x) || defined(KL2x)
+ spiConfig.tar0 = SPIx_CTARn_FMSZ(7) | SPIx_CTARn_ASC(1);
+
+ if (lsbFirst) {
+ spiConfig.tar0 |= SPIx_CTARn_LSBFE;
+ }
+
+ switch (mode) {
+ case 0:
+ break;
+ case 1:
+ spiConfig.tar0 |= SPIx_CTARn_CPHA;
+ break;
+ case 2:
+ spiConfig.tar0 |= SPIx_CTARn_CPOL;
+ break;
+ case 3:
+ spiConfig.tar0 |= SPIx_CTARn_CPHA | SPIx_CTARn_CPOL;
+ break;
+ }
+
+ switch (roundedDivisor) {
+ case 2:
+ spiConfig.tar0 |= SPIx_CTARn_BR(0);
+ break;
+ case 4:
+ spiConfig.tar0 |= SPIx_CTARn_BR(1);
+ break;
+ case 8:
+ spiConfig.tar0 |= SPIx_CTARn_BR(3);
+ break;
+ case 16:
+ spiConfig.tar0 |= SPIx_CTARn_BR(4);
+ break;
+ case 32:
+ spiConfig.tar0 |= SPIx_CTARn_BR(5);
+ break;
+ case 64:
+ spiConfig.tar0 |= SPIx_CTARn_BR(6);
+ break;
+ case 128:
+ spiConfig.tar0 |= SPIx_CTARn_BR(7);
+ break;
+ case 256:
+ spiConfig.tar0 |= SPIx_CTARn_BR(8);
+ break;
+ }
+#else
spiConfig.cr1 = 0;
if (lsbFirst) {
@@ -103,6 +156,7 @@ bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor) {
spiConfig.cr1 |= SPI_CR1_BR_2 | SPI_CR1_BR_1 | SPI_CR1_BR_0;
break;
}
+#endif
currentSlavePin = slavePin;
spiConfig.ssport = PAL_PORT(slavePin);
diff --git a/drivers/chibios/spi_master.h b/drivers/chibios/spi_master.h
index e93580e319..b5a6ef1437 100644
--- a/drivers/chibios/spi_master.h
+++ b/drivers/chibios/spi_master.h
@@ -21,6 +21,7 @@
#include <stdbool.h>
#include "gpio.h"
+#include "chibios_config.h"
#ifndef SPI_DRIVER
# define SPI_DRIVER SPID2
@@ -31,7 +32,11 @@
#endif
#ifndef SPI_SCK_PAL_MODE
-# define SPI_SCK_PAL_MODE 5
+# if defined(USE_GPIOV1)
+# define SPI_SCK_PAL_MODE PAL_MODE_STM32_ALTERNATE_PUSHPULL
+# else
+# define SPI_SCK_PAL_MODE 5
+# endif
#endif
#ifndef SPI_MOSI_PIN
@@ -39,7 +44,11 @@
#endif
#ifndef SPI_MOSI_PAL_MODE
-# define SPI_MOSI_PAL_MODE 5
+# if defined(USE_GPIOV1)
+# define SPI_MOSI_PAL_MODE PAL_MODE_STM32_ALTERNATE_PUSHPULL
+# else
+# define SPI_MOSI_PAL_MODE 5
+# endif
#endif
#ifndef SPI_MISO_PIN
@@ -47,7 +56,11 @@
#endif
#ifndef SPI_MISO_PAL_MODE
-# define SPI_MISO_PAL_MODE 5
+# if defined(USE_GPIOV1)
+# define SPI_MISO_PAL_MODE PAL_MODE_STM32_ALTERNATE_PUSHPULL
+# else
+# define SPI_MISO_PAL_MODE 5
+# endif
#endif
typedef int16_t spi_status_t;
diff --git a/drivers/lcd/st7565.c b/drivers/lcd/st7565.c
new file mode 100644
index 0000000000..4b4891ce71
--- /dev/null
+++ b/drivers/lcd/st7565.c
@@ -0,0 +1,479 @@
+/*
+Copyright 2021
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "st7565.h"
+
+#include <string.h>
+
+#include "keyboard.h"
+#include "progmem.h"
+#include "timer.h"
+#include "wait.h"
+
+#include ST7565_FONT_H
+
+// Fundamental Commands
+#define CONTRAST 0x81
+#define DISPLAY_ALL_ON 0xA5
+#define DISPLAY_ALL_ON_RESUME 0xA4
+#define NORMAL_DISPLAY 0xA6
+#define DISPLAY_ON 0xAF
+#define DISPLAY_OFF 0xAE
+#define NOP 0xE3
+
+// Addressing Setting Commands
+#define PAM_SETCOLUMN_LSB 0x00
+#define PAM_SETCOLUMN_MSB 0x10
+#define PAM_PAGE_ADDR 0xB0 // 0xb0 -- 0xb7
+
+// Hardware Configuration Commands
+#define DISPLAY_START_LINE 0x40
+#define SEGMENT_REMAP 0xA0
+#define SEGMENT_REMAP_INV 0xA1
+#define COM_SCAN_INC 0xC0
+#define COM_SCAN_DEC 0xC8
+#define LCD_BIAS_7 0xA3
+#define LCD_BIAS_9 0xA2
+#define RESISTOR_RATIO 0x20
+#define POWER_CONTROL 0x28
+
+// Misc defines
+#ifndef ST7565_BLOCK_COUNT
+# define ST7565_BLOCK_COUNT (sizeof(ST7565_BLOCK_TYPE) * 8)
+#endif
+#ifndef ST7565_BLOCK_SIZE
+# define ST7565_BLOCK_SIZE (ST7565_MATRIX_SIZE / ST7565_BLOCK_COUNT)
+#endif
+
+#define ST7565_ALL_BLOCKS_MASK (((((ST7565_BLOCK_TYPE)1 << (ST7565_BLOCK_COUNT - 1)) - 1) << 1) | 1)
+
+#define HAS_FLAGS(bits, flags) ((bits & flags) == flags)
+
+// Display buffer's is the same as the display memory layout
+// this is so we don't end up with rounding errors with
+// parts of the display unusable or don't get cleared correctly
+// and also allows for drawing & inverting
+uint8_t st7565_buffer[ST7565_MATRIX_SIZE];
+uint8_t * st7565_cursor;
+ST7565_BLOCK_TYPE st7565_dirty = 0;
+bool st7565_initialized = false;
+bool st7565_active = false;
+display_rotation_t st7565_rotation = DISPLAY_ROTATION_0;
+#if ST7565_TIMEOUT > 0
+uint32_t st7565_timeout;
+#endif
+#if ST7565_UPDATE_INTERVAL > 0
+uint16_t st7565_update_timeout;
+#endif
+
+// Flips the rendering bits for a character at the current cursor position
+static void InvertCharacter(uint8_t *cursor) {
+ const uint8_t *end = cursor + ST7565_FONT_WIDTH;
+ while (cursor < end) {
+ *cursor = ~(*cursor);
+ cursor++;
+ }
+}
+
+bool st7565_init(display_rotation_t rotation) {
+ setPinOutput(ST7565_A0_PIN);
+ writePinHigh(ST7565_A0_PIN);
+ setPinOutput(ST7565_RST_PIN);
+ writePinHigh(ST7565_RST_PIN);
+
+ st7565_rotation = st7565_init_user(rotation);
+
+ spi_init();
+ spi_start(ST7565_SS_PIN, false, 0, ST7565_SPI_CLK_DIVISOR);
+
+ st7565_reset();
+
+ st7565_send_cmd(LCD_BIAS_7);
+ if (!HAS_FLAGS(st7565_rotation, DISPLAY_ROTATION_180)) {
+ st7565_send_cmd(SEGMENT_REMAP);
+ st7565_send_cmd(COM_SCAN_DEC);
+ } else {
+ st7565_send_cmd(SEGMENT_REMAP_INV);
+ st7565_send_cmd(COM_SCAN_INC);
+ }
+ st7565_send_cmd(DISPLAY_START_LINE | 0x00);
+ st7565_send_cmd(CONTRAST);
+ st7565_send_cmd(ST7565_CONTRAST);
+ st7565_send_cmd(RESISTOR_RATIO | 0x01);
+ st7565_send_cmd(POWER_CONTROL | 0x04);
+ wait_ms(50);
+ st7565_send_cmd(POWER_CONTROL | 0x06);
+ wait_ms(50);
+ st7565_send_cmd(POWER_CONTROL | 0x07);
+ wait_ms(10);
+ st7565_send_cmd(DISPLAY_ON);
+ st7565_send_cmd(DISPLAY_ALL_ON_RESUME);
+ st7565_send_cmd(NORMAL_DISPLAY);
+
+ spi_stop();
+
+#if ST7565_TIMEOUT > 0
+ st7565_timeout = timer_read32() + ST7565_TIMEOUT;
+#endif
+
+ st7565_clear();
+ st7565_initialized = true;
+ st7565_active = true;
+ return true;
+}
+
+__attribute__((weak)) display_rotation_t st7565_init_user(display_rotation_t rotation) { return rotation; }
+
+void st7565_clear(void) {
+ memset(st7565_buffer, 0, sizeof(st7565_buffer));
+ st7565_cursor = &st7565_buffer[0];
+ st7565_dirty = ST7565_ALL_BLOCKS_MASK;
+}
+
+uint8_t crot(uint8_t a, int8_t n) {
+ const uint8_t mask = 0x7;
+ n &= mask;
+ return a << n | a >> (-n & mask);
+}
+
+void st7565_render(void) {
+ if (!st7565_initialized) {
+ return;
+ }
+
+ // Do we have work to do?
+ st7565_dirty &= ST7565_ALL_BLOCKS_MASK;
+ if (!st7565_dirty) {
+ return;
+ }
+
+ // Find first dirty block
+ uint8_t update_start = 0;
+ while (!(st7565_dirty & ((ST7565_BLOCK_TYPE)1 << update_start))) {
+ ++update_start;
+ }
+
+ // Calculate commands to set memory addressing bounds.
+ uint8_t start_page = ST7565_BLOCK_SIZE * update_start / ST7565_DISPLAY_WIDTH;
+ uint8_t start_column = ST7565_BLOCK_SIZE * update_start % ST7565_DISPLAY_WIDTH;
+ // IC has 132 segment drivers, for panels with less width we need to offset the starting column
+ if (HAS_FLAGS(st7565_rotation, DISPLAY_ROTATION_180)) {
+ start_column += (132 - ST7565_DISPLAY_WIDTH);
+ }
+
+ spi_start(ST7565_SS_PIN, false, 0, ST7565_SPI_CLK_DIVISOR);
+
+ st7565_send_cmd(PAM_PAGE_ADDR | start_page);
+ st7565_send_cmd(PAM_SETCOLUMN_LSB | ((ST7565_COLUMN_OFFSET + start_column) & 0x0f));
+ st7565_send_cmd(PAM_SETCOLUMN_MSB | ((ST7565_COLUMN_OFFSET + start_column) >> 4 & 0x0f));
+
+ st7565_send_data(&st7565_buffer[ST7565_BLOCK_SIZE * update_start], ST7565_BLOCK_SIZE);
+
+ // Turn on display if it is off
+ st7565_on();
+
+ // Clear dirty flag
+ st7565_dirty &= ~((ST7565_BLOCK_TYPE)1 << update_start);
+}
+
+void st7565_set_cursor(uint8_t col, uint8_t line) {
+ uint16_t index = line * ST7565_DISPLAY_WIDTH + col * ST7565_FONT_WIDTH;
+
+ // Out of bounds?
+ if (index >= ST7565_MATRIX_SIZE) {
+ index = 0;
+ }
+
+ st7565_cursor = &st7565_buffer[index];
+}
+
+void st7565_advance_page(bool clearPageRemainder) {
+ uint16_t index = st7565_cursor - &st7565_buffer[0];
+ uint8_t remaining = ST7565_DISPLAY_WIDTH - (index % ST7565_DISPLAY_WIDTH);
+
+ if (clearPageRemainder) {
+ // Remaining Char count
+ remaining = remaining / ST7565_FONT_WIDTH;
+
+ // Write empty character until next line
+ while (remaining--) st7565_write_char(' ', false);
+ } else {
+ // Next page index out of bounds?
+ if (index + remaining >= ST7565_MATRIX_SIZE) {
+ index = 0;
+ remaining = 0;
+ }
+
+ st7565_cursor = &st7565_buffer[index + remaining];
+ }
+}
+
+void st7565_advance_char(void) {
+ uint16_t nextIndex = st7565_cursor - &st7565_buffer[0] + ST7565_FONT_WIDTH;
+ uint8_t remainingSpace = ST7565_DISPLAY_WIDTH - (nextIndex % ST7565_DISPLAY_WIDTH);
+
+ // Do we have enough space on the current line for the next character
+ if (remainingSpace < ST7565_FONT_WIDTH) {
+ nextIndex += remainingSpace;
+ }
+
+ // Did we go out of bounds
+ if (nextIndex >= ST7565_MATRIX_SIZE) {
+ nextIndex = 0;
+ }
+
+ // Update cursor position
+ st7565_cursor = &st7565_buffer[nextIndex];
+}
+
+// Main handler that writes character data to the display buffer
+void st7565_write_char(const char data, bool invert) {
+ // Advance to the next line if newline
+ if (data == '\n') {
+ // Old source wrote ' ' until end of line...
+ st7565_advance_page(true);
+ return;
+ }
+
+ if (data == '\r') {
+ st7565_advance_page(false);
+ return;
+ }
+
+ // copy the current render buffer to check for dirty after
+ static uint8_t st7565_temp_buffer[ST7565_FONT_WIDTH];
+ memcpy(&st7565_temp_buffer, st7565_cursor, ST7565_FONT_WIDTH);
+
+ _Static_assert(sizeof(font) >= ((ST7565_FONT_END + 1 - ST7565_FONT_START) * ST7565_FONT_WIDTH), "ST7565_FONT_END references outside array");
+
+ // set the reder buffer data
+ uint8_t cast_data = (uint8_t)data; // font based on unsigned type for index
+ if (cast_data < ST7565_FONT_START || cast_data > ST7565_FONT_END) {
+ memset(st7565_cursor, 0x00, ST7565_FONT_WIDTH);
+ } else {
+ const uint8_t *glyph = &font[(cast_data - ST7565_FONT_START) * ST7565_FONT_WIDTH];
+ memcpy_P(st7565_cursor, glyph, ST7565_FONT_WIDTH);
+ }
+
+ // Invert if needed
+ if (invert) {
+ InvertCharacter(st7565_cursor);
+ }
+
+ // Dirty check
+ if (memcmp(&st7565_temp_buffer, st7565_cursor, ST7565_FONT_WIDTH)) {
+ uint16_t index = st7565_cursor - &st7565_buffer[0];
+ st7565_dirty |= ((ST7565_BLOCK_TYPE)1 << (index / ST7565_BLOCK_SIZE));
+ // Edgecase check if the written data spans the 2 chunks
+ st7565_dirty |= ((ST7565_BLOCK_TYPE)1 << ((index + ST7565_FONT_WIDTH - 1) / ST7565_BLOCK_SIZE));
+ }
+
+ // Finally move to the next char
+ st7565_advance_char();
+}
+
+void st7565_write(const char *data, bool invert) {
+ const char *end = data + strlen(data);
+ while (data < end) {
+ st7565_write_char(*data, invert);
+ data++;
+ }
+}
+
+void st7565_write_ln(const char *data, bool invert) {
+ st7565_write(data, invert);
+ st7565_advance_page(true);
+}
+
+void st7565_pan(bool left) {
+ uint16_t i = 0;
+ for (uint16_t y = 0; y < ST7565_DISPLAY_HEIGHT / 8; y++) {
+ if (left) {
+ for (uint16_t x = 0; x < ST7565_DISPLAY_WIDTH - 1; x++) {
+ i = y * ST7565_DISPLAY_WIDTH + x;
+ st7565_buffer[i] = st7565_buffer[i + 1];
+ }
+ } else {
+ for (uint16_t x = ST7565_DISPLAY_WIDTH - 1; x > 0; x--) {
+ i = y * ST7565_DISPLAY_WIDTH + x;
+ st7565_buffer[i] = st7565_buffer[i - 1];
+ }
+ }
+ }
+ st7565_dirty = ST7565_ALL_BLOCKS_MASK;
+}
+
+display_buffer_reader_t st7565_read_raw(uint16_t start_index) {
+ if (start_index > ST7565_MATRIX_SIZE) start_index = ST7565_MATRIX_SIZE;
+ display_buffer_reader_t ret_reader;
+ ret_reader.current_element = &st7565_buffer[start_index];
+ ret_reader.remaining_element_count = ST7565_MATRIX_SIZE - start_index;
+ return ret_reader;
+}
+
+void st7565_write_raw_byte(const char data, uint16_t index) {
+ if (index > ST7565_MATRIX_SIZE) index = ST7565_MATRIX_SIZE;
+ if (st7565_buffer[index] == data) return;
+ st7565_buffer[index] = data;
+ st7565_dirty |= ((ST7565_BLOCK_TYPE)1 << (index / ST7565_BLOCK_SIZE));
+}
+
+void st7565_write_raw(const char *data, uint16_t size) {
+ uint16_t cursor_start_index = st7565_cursor - &st7565_buffer[0];
+ if ((size + cursor_start_index) > ST7565_MATRIX_SIZE) size = ST7565_MATRIX_SIZE - cursor_start_index;
+ for (uint16_t i = cursor_start_index; i < cursor_start_index + size; i++) {
+ if (st7565_buffer[i] == data[i]) continue;
+ st7565_buffer[i] = data[i];
+ st7565_dirty |= ((ST7565_BLOCK_TYPE)1 << (i / ST7565_BLOCK_SIZE));
+ }
+}
+
+void st7565_write_pixel(uint8_t x, uint8_t y, bool on) {
+ if (x >= ST7565_DISPLAY_WIDTH) {
+ return;
+ }
+ uint16_t index = x + (y / 8) * ST7565_DISPLAY_WIDTH;
+ if (index >= ST7565_MATRIX_SIZE) {
+ return;
+ }
+ uint8_t data = st7565_buffer[index];
+ if (on) {
+ data |= (1 << (y % 8));
+ } else {
+ data &= ~(1 << (y % 8));
+ }
+ if (st7565_buffer[index] != data) {
+ st7565_buffer[index] = data;
+ st7565_dirty |= ((ST7565_BLOCK_TYPE)1 << (index / ST7565_BLOCK_SIZE));
+ }
+}
+
+#if defined(__AVR__)
+void st7565_write_P(const char *data, bool invert) {
+ uint8_t c = pgm_read_byte(data);
+ while (c != 0) {
+ st7565_write_char(c, invert);
+ c = pgm_read_byte(++data);
+ }
+}
+
+void st7565_write_ln_P(const char *data, bool invert) {
+ st7565_write_P(data, invert);
+ st7565_advance_page(true);
+}
+
+void st7565_write_raw_P(const char *data, uint16_t size) {
+ uint16_t cursor_start_index = st7565_cursor - &st7565_buffer[0];
+ if ((size + cursor_start_index) > ST7565_MATRIX_SIZE) size = ST7565_MATRIX_SIZE - cursor_start_index;
+ for (uint16_t i = cursor_start_index; i < cursor_start_index + size; i++) {
+ uint8_t c = pgm_read_byte(data++);
+ if (st7565_buffer[i] == c) continue;
+ st7565_buffer[i] = c;
+ st7565_dirty |= ((ST7565_BLOCK_TYPE)1 << (i / ST7565_BLOCK_SIZE));
+ }
+}
+#endif // defined(__AVR__)
+
+bool st7565_on(void) {
+ if (!st7565_initialized) {
+ return st7565_active;
+ }
+
+#if ST7565_TIMEOUT > 0
+ st7565_timeout = timer_read32() + ST7565_TIMEOUT;
+#endif
+
+ if (!st7565_active) {
+ spi_start(ST7565_SS_PIN, false, 0, ST7565_SPI_CLK_DIVISOR);
+ st7565_send_cmd(DISPLAY_ON);
+ spi_stop();
+ st7565_active = true;
+ st7565_on_user();
+ }
+ return st7565_active;
+}
+
+__attribute__((weak)) void st7565_on_user(void) {}
+
+bool st7565_off(void) {
+ if (!st7565_initialized) {
+ return !st7565_active;
+ }
+
+ if (st7565_active) {
+ spi_start(ST7565_SS_PIN, false, 0, ST7565_SPI_CLK_DIVISOR);
+ st7565_send_cmd(DISPLAY_OFF);
+ spi_stop();
+ st7565_active = false;
+ st7565_off_user();
+ }
+ return !st7565_active;
+}
+
+__attribute__((weak)) void st7565_off_user(void) {}
+
+bool st7565_is_on(void) { return st7565_active; }
+
+uint8_t st7565_max_chars(void) { return ST7565_DISPLAY_WIDTH / ST7565_FONT_WIDTH; }
+
+uint8_t st7565_max_lines(void) { return ST7565_DISPLAY_HEIGHT / ST7565_FONT_HEIGHT; }
+
+void st7565_task(void) {
+ if (!st7565_initialized) {
+ return;
+ }
+
+#if ST7565_UPDATE_INTERVAL > 0
+ if (timer_elapsed(st7565_update_timeout) >= ST7565_UPDATE_INTERVAL) {
+ st7565_update_timeout = timer_read();
+ st7565_set_cursor(0, 0);
+ st7565_task_user();
+ }
+#else
+ st7565_set_cursor(0, 0);
+ st7565_task_user();
+#endif
+
+ // Smart render system, no need to check for dirty
+ st7565_render();
+
+ // Display timeout check
+#if ST7565_TIMEOUT > 0
+ if (st7565_active && timer_expired32(timer_read32(), st7565_timeout)) {
+ st7565_off();
+ }
+#endif
+}
+
+__attribute__((weak)) void st7565_task_user(void) {}
+
+void st7565_reset(void) {
+ writePinLow(ST7565_RST_PIN);
+ wait_ms(20);
+ writePinHigh(ST7565_RST_PIN);
+ wait_ms(20);
+}
+
+spi_status_t st7565_send_cmd(uint8_t cmd) {
+ writePinLow(ST7565_A0_PIN);
+ return spi_write(cmd);
+}
+
+spi_status_t st7565_send_data(uint8_t *data, uint16_t length) {
+ writePinHigh(ST7565_A0_PIN);
+ return spi_transmit(data, length);
+}
diff --git a/drivers/lcd/st7565.h b/drivers/lcd/st7565.h
new file mode 100644
index 0000000000..53cfc9a810
--- /dev/null
+++ b/drivers/lcd/st7565.h
@@ -0,0 +1,215 @@
+/*
+Copyright 2021
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include "spi_master.h"
+
+#ifndef ST7565_DISPLAY_WIDTH
+# define ST7565_DISPLAY_WIDTH 128
+#endif
+#ifndef ST7565_DISPLAY_HEIGHT
+# define ST7565_DISPLAY_HEIGHT 32
+#endif
+#ifndef ST7565_MATRIX_SIZE
+# define ST7565_MATRIX_SIZE (ST7565_DISPLAY_HEIGHT / 8 * ST7565_DISPLAY_WIDTH) // 1024 (compile time mathed)
+#endif
+#ifndef ST7565_BLOCK_TYPE
+# define ST7565_BLOCK_TYPE uint16_t
+#endif
+#ifndef ST7565_BLOCK_COUNT
+# define ST7565_BLOCK_COUNT (sizeof(ST7565_BLOCK_TYPE) * 8) // 32 (compile time mathed)
+#endif
+#ifndef ST7565_BLOCK_SIZE
+# define ST7565_BLOCK_SIZE (ST7565_MATRIX_SIZE / ST7565_BLOCK_COUNT) // 32 (compile time mathed)
+#endif
+
+// the column address corresponding to the first column in the display hardware
+#if !defined(ST7565_COLUMN_OFFSET)
+# define ST7565_COLUMN_OFFSET 0
+#endif
+
+// spi clock divisor
+#if !defined(ST7565_SPI_CLK_DIVISOR)
+# define ST7565_SPI_CLK_DIVISOR 4
+#endif
+
+// Custom font file to use
+#if !defined(ST7565_FONT_H)
+# define ST7565_FONT_H "glcdfont.c"
+#endif
+// unsigned char value of the first character in the font file
+#if !defined(ST7565_FONT_START)
+# define ST7565_FONT_START 0
+#endif
+// unsigned char value of the last character in the font file
+#if !defined(ST7565_FONT_END)
+# define ST7565_FONT_END 223
+#endif
+// Font render width
+#if !defined(ST7565_FONT_WIDTH)
+# define ST7565_FONT_WIDTH 6
+#endif
+// Font render height
+#if !defined(ST7565_FONT_HEIGHT)
+# define ST7565_FONT_HEIGHT 8
+#endif
+// Default contrast level
+#if !defined(ST7565_CONTRAST)
+# define ST7565_CONTRAST 32
+#endif
+
+#if !defined(ST7565_TIMEOUT)
+# if defined(ST7565_DISABLE_TIMEOUT)
+# define ST7565_TIMEOUT 0
+# else
+# define ST7565_TIMEOUT 60000
+# endif
+#endif
+
+#if !defined(ST7565_UPDATE_INTERVAL) && defined(SPLIT_KEYBOARD)
+# define ST7565_UPDATE_INTERVAL 50
+#endif
+
+typedef struct __attribute__((__packed__)) {
+ uint8_t *current_element;
+ uint16_t remaining_element_count;
+} display_buffer_reader_t;
+
+// Rotation enum values are flags
+typedef enum { DISPLAY_ROTATION_0, DISPLAY_ROTATION_180 } display_rotation_t;
+
+// Initialize the display, rotating the rendered output based on the define passed in.
+// Returns true if the display was initialized successfully
+bool st7565_init(display_rotation_t rotation);
+
+// Called at the start of st7565_init, weak function overridable by the user
+// rotation - the value passed into st7565_init
+// Return new display_rotation_t if you want to override default rotation
+display_rotation_t st7565_init_user(display_rotation_t rotation);
+
+// Clears the display buffer, resets cursor position to 0, and sets the buffer to dirty for rendering
+void st7565_clear(void);
+
+// Renders the dirty chunks of the buffer to display
+void st7565_render(void);
+
+// Moves cursor to character position indicated by column and line, wraps if out of bounds
+// Max column denoted by 'st7565_max_chars()' and max lines by 'st7565_max_lines()' functions
+void st7565_set_cursor(uint8_t col, uint8_t line);
+
+// Advances the cursor to the next page, writing ' ' if true
+// Wraps to the begining when out of bounds
+void st7565_advance_page(bool clearPageRemainder);
+
+// Moves the cursor forward 1 character length
+// Advance page if there is not enough room for the next character
+// Wraps to the begining when out of bounds
+void st7565_advance_char(void);
+
+// Writes a single character to the buffer at current cursor position
+// Advances the cursor while writing, inverts the pixels if true
+// Main handler that writes character data to the display buffer
+void st7565_write_char(const char data, bool invert);
+
+// Writes a string to the buffer at current cursor position
+// Advances the cursor while writing, inverts the pixels if true
+void st7565_write(const char *data, bool invert);
+
+// Writes a string to the buffer at current cursor position
+// Advances the cursor while writing, inverts the pixels if true
+// Advances the cursor to the next page, wiring ' ' to the remainder of the current page
+void st7565_write_ln(const char *data, bool invert);
+
+// Pans the buffer to the right (or left by passing true) by moving contents of the buffer
+// Useful for moving the screen in preparation for new drawing
+void st7565_pan(bool left);
+
+// Returns a pointer to the requested start index in the buffer plus remaining
+// buffer length as struct
+display_buffer_reader_t st7565_read_raw(uint16_t start_index);
+
+// Writes a string to the buffer at current cursor position
+void st7565_write_raw(const char *data, uint16_t size);
+
+// Writes a single byte into the buffer at the specified index
+void st7565_write_raw_byte(const char data, uint16_t index);
+
+// Sets a specific pixel on or off
+// Coordinates start at top-left and go right and down for positive x and y
+void st7565_write_pixel(uint8_t x, uint8_t y, bool on);
+
+#if defined(__AVR__)
+// Writes a PROGMEM string to the buffer at current cursor position
+// Advances the cursor while writing, inverts the pixels if true
+// Remapped to call 'void st7565_write(const char *data, bool invert);' on ARM
+void st7565_write_P(const char *data, bool invert);
+
+// Writes a PROGMEM string to the buffer at current cursor position
+// Advances the cursor while writing, inverts the pixels if true
+// Advances the cursor to the next page, wiring ' ' to the remainder of the current page
+// Remapped to call 'void st7565_write_ln(const char *data, bool invert);' on ARM
+void st7565_write_ln_P(const char *data, bool invert);
+
+// Writes a PROGMEM string to the buffer at current cursor position
+void st7565_write_raw_P(const char *data, uint16_t size);
+#else
+# define st7565_write_P(data, invert) st7565_write(data, invert)
+# define st7565_write_ln_P(data, invert) st7565_write_ln(data, invert)
+# define st7565_write_raw_P(data, size) st7565_write_raw(data, size)
+#endif // defined(__AVR__)
+
+// Can be used to manually turn on the screen if it is off
+// Returns true if the screen was on or turns on
+bool st7565_on(void);
+
+// Called when st7565_on() turns on the screen, weak function overridable by the user
+// Not called if the screen is already on
+void st7565_on_user(void);
+
+// Can be used to manually turn off the screen if it is on
+// Returns true if the screen was off or turns off
+bool st7565_off(void);
+
+// Called when st7565_off() turns off the screen, weak function overridable by the user
+// Not called if the screen is already off
+void st7565_off_user(void);
+
+// Returns true if the screen is currently on, false if it is
+// not
+bool st7565_is_on(void);
+
+// Basically it's st7565_render, but with timeout management and st7565_task_user calling!
+void st7565_task(void);
+
+// Called at the start of st7565_task, weak function overridable by the user
+void st7565_task_user(void);
+
+// Returns the maximum number of characters that will fit on a line
+uint8_t st7565_max_chars(void);
+
+// Returns the maximum number of lines that will fit on the display
+uint8_t st7565_max_lines(void);
+
+void st7565_reset(void);
+
+spi_status_t st7565_send_cmd(uint8_t cmd);
+
+spi_status_t st7565_send_data(uint8_t *data, uint16_t length);