// 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(); } }