- // Copyright (c) 2018 Cirque Corp. Restrictions apply. See: www.cirque.com/sw-license
- #include "cirque_pinnacle.h"
- #include "spi_master.h"
- #include "print.h"
- #include "debug.h"
-
- // Masks for Cirque Register Access Protocol (RAP)
- #define WRITE_MASK 0x80
- #define READ_MASK 0xA0
- #define FILLER_BYTE 0xFC
-
- extern bool touchpad_init;
-
- /* RAP Functions */
- // Reads <count> Pinnacle registers starting at <address>
- 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); // 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_write(FILLER_BYTE); // write filler, receive data on the third filler send
- }
- } else {
- #ifdef CONSOLE_ENABLE
- dprintf("error right touchpad\n");
- #endif
- touchpad_init = false;
- }
- spi_stop();
- }
- }
-
- // Writes single-byte <data> to <address>
- void RAP_Write(uint8_t address, uint8_t data) {
- uint8_t cmdByte = WRITE_MASK | address; // Form the WRITE 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_write(data);
- } else {
- #ifdef CONSOLE_ENABLE
- dprintf("error right touchpad\n");
- #endif
- touchpad_init = false;
- }
- spi_stop();
- }
- }
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