diff options
Diffstat (limited to 'drivers/sensors/cirque_pinnacle_spi.c')
| -rw-r--r-- | drivers/sensors/cirque_pinnacle_spi.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/sensors/cirque_pinnacle_spi.c b/drivers/sensors/cirque_pinnacle_spi.c index e00e73eb8c..34c77df07b 100644 --- a/drivers/sensors/cirque_pinnacle_spi.c +++ b/drivers/sensors/cirque_pinnacle_spi.c @@ -7,6 +7,7 @@ // Masks for Cirque Register Access Protocol (RAP) #define WRITE_MASK 0x80 #define READ_MASK 0xA0 +#define FILLER_BYTE 0xFC extern bool touchpad_init; @@ -16,11 +17,11 @@ void RAP_ReadBytes(uint8_t address, uint8_t* data, uint8_t count) { uint8_t cmdByte = READ_MASK | address; // Form the READ command byte if (touchpad_init) { if (spi_start(CIRQUE_PINNACLE_SPI_CS_PIN, CIRQUE_PINNACLE_SPI_LSBFIRST, CIRQUE_PINNACLE_SPI_MODE, CIRQUE_PINNACLE_SPI_DIVISOR)) { - spi_write(cmdByte); - spi_read(); // filler - spi_read(); // filler + spi_write(cmdByte); // write command byte, receive filler + spi_write(FILLER_BYTE); // write & receive filler + spi_write(FILLER_BYTE); // write & receive filler for (uint8_t i = 0; i < count; i++) { - data[i] = spi_read(); // each sepsequent read gets another register's contents + data[i] = spi_write(FILLER_BYTE); // write filler, receive data on the third filler send } } else { #ifdef CONSOLE_ENABLE |