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-rw-r--r--drivers/avr/spi_master.c180
1 files changed, 0 insertions, 180 deletions
diff --git a/drivers/avr/spi_master.c b/drivers/avr/spi_master.c
deleted file mode 100644
index 4e8fd3bcdf..0000000000
--- a/drivers/avr/spi_master.c
+++ /dev/null
@@ -1,180 +0,0 @@
-/* Copyright 2020
- *
- * 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 3 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 <https://www.gnu.org/licenses/>.
- */
-
-#include "spi_master.h"
-
-#include "timer.h"
-
-#if defined(__AVR_AT90USB162__) || defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__) || defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__)
-# define SPI_SCK_PIN B1
-# define SPI_MOSI_PIN B2
-# define SPI_MISO_PIN B3
-#elif defined(__AVR_ATmega32A__)
-# define SPI_SCK_PIN B7
-# define SPI_MOSI_PIN B5
-# define SPI_MISO_PIN B6
-#elif defined(__AVR_ATmega328P__) || defined(__AVR_ATmega328__)
-# define SPI_SCK_PIN B5
-# define SPI_MOSI_PIN B3
-# define SPI_MISO_PIN B4
-#endif
-
-#ifndef SPI_TIMEOUT
-# define SPI_TIMEOUT 100
-#endif
-
-static pin_t currentSlavePin = NO_PIN;
-static uint8_t currentSlaveConfig = 0;
-static bool currentSlave2X = false;
-
-void spi_init(void) {
- writePinHigh(SPI_SS_PIN);
- setPinOutput(SPI_SCK_PIN);
- setPinOutput(SPI_MOSI_PIN);
- setPinInput(SPI_MISO_PIN);
-
- SPCR = (_BV(SPE) | _BV(MSTR));
-}
-
-bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor) {
- if (currentSlavePin != NO_PIN || slavePin == NO_PIN) {
- return false;
- }
-
- currentSlaveConfig = 0;
-
- if (lsbFirst) {
- currentSlaveConfig |= _BV(DORD);
- }
-
- switch (mode) {
- case 1:
- currentSlaveConfig |= _BV(CPHA);
- break;
- case 2:
- currentSlaveConfig |= _BV(CPOL);
- break;
- case 3:
- currentSlaveConfig |= (_BV(CPOL) | _BV(CPHA));
- break;
- }
-
- uint16_t roundedDivisor = 1;
- while (roundedDivisor < divisor) {
- roundedDivisor <<= 1;
- }
-
- switch (roundedDivisor) {
- case 16:
- currentSlaveConfig |= _BV(SPR0);
- break;
- case 64:
- currentSlaveConfig |= _BV(SPR1);
- break;
- case 128:
- currentSlaveConfig |= (_BV(SPR1) | _BV(SPR0));
- break;
- case 2:
- currentSlave2X = true;
- break;
- case 8:
- currentSlave2X = true;
- currentSlaveConfig |= _BV(SPR0);
- break;
- case 32:
- currentSlave2X = true;
- currentSlaveConfig |= _BV(SPR1);
- break;
- }
-
- SPCR |= currentSlaveConfig;
- if (currentSlave2X) {
- SPSR |= _BV(SPI2X);
- }
- currentSlavePin = slavePin;
- setPinOutput(currentSlavePin);
- writePinLow(currentSlavePin);
-
- return true;
-}
-
-spi_status_t spi_write(uint8_t data) {
- SPDR = data;
-
- uint16_t timeout_timer = timer_read();
- while (!(SPSR & _BV(SPIF))) {
- if ((timer_read() - timeout_timer) >= SPI_TIMEOUT) {
- return SPI_STATUS_TIMEOUT;
- }
- }
-
- return SPDR;
-}
-
-spi_status_t spi_read() {
- SPDR = 0x00; // Dummy
-
- uint16_t timeout_timer = timer_read();
- while (!(SPSR & _BV(SPIF))) {
- if ((timer_read() - timeout_timer) >= SPI_TIMEOUT) {
- return SPI_STATUS_TIMEOUT;
- }
- }
-
- return SPDR;
-}
-
-spi_status_t spi_transmit(const uint8_t *data, uint16_t length) {
- spi_status_t status;
-
- for (uint16_t i = 0; i < length; i++) {
- status = spi_write(data[i]);
-
- if (status < 0) {
- return status;
- }
- }
-
- return SPI_STATUS_SUCCESS;
-}
-
-spi_status_t spi_receive(uint8_t *data, uint16_t length) {
- spi_status_t status;
-
- for (uint16_t i = 0; i < length; i++) {
- status = spi_read();
-
- if (status >= 0) {
- data[i] = status;
- } else {
- return status;
- }
- }
-
- return SPI_STATUS_SUCCESS;
-}
-
-void spi_stop(void) {
- if (currentSlavePin != NO_PIN) {
- setPinOutput(currentSlavePin);
- writePinHigh(currentSlavePin);
- currentSlavePin = NO_PIN;
- SPSR &= ~(_BV(SPI2X));
- SPCR &= ~(currentSlaveConfig);
- currentSlaveConfig = 0;
- currentSlave2X = false;
- }
-}