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#include <stdlib.h>
#include <stdint.h>
#include "encoding.h"
#include "platform.h"
#include "eos.h"
#include "board.h"
#include "i2s.h"
#include "net.h"
#include "spi_dev.h"
#include "display.h"
#define BIT_PUT(b, pin) if (b) GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << (pin)); else GPIO_REG(GPIO_OUTPUT_VAL) &= ~(1 << (pin));
#define BIT_GET(pin) ((GPIO_REG(GPIO_INPUT_VAL) & (1 << (pin))) >> (pin))
int eos_disp_select(void) {
if (eos_i2s_running()) return EOS_ERR_BUSY;
if (eos_spi_dev() != EOS_SPI_DEV_NET) return EOS_ERR_BUSY;
eos_net_stop();
GPIO_REG(GPIO_IOF_EN) &= ~SPI_IOF_MASK;
}
void eos_disp_deselect(void) {
GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << IOF_SPI1_MOSI);
GPIO_REG(GPIO_IOF_EN) |= SPI_IOF_MASK;
eos_net_start(0);
}
void eos_disp_cs_set(void) {
GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << DISP_PIN_CS);
}
void eos_disp_cs_clear(void) {
GPIO_REG(GPIO_OUTPUT_VAL) &= ~(1 << DISP_PIN_CS);
}
void eos_disp_write(uint8_t dc, uint8_t data) {
int i;
BIT_PUT(dc, IOF_SPI1_MOSI);
// sleep
BIT_PUT(1, IOF_SPI1_SCK);
for (i=0; i<8; i++) {
// sleep
BIT_PUT(0, IOF_SPI1_SCK);
BIT_PUT(data & 0x80, IOF_SPI1_MOSI);
// sleep
BIT_PUT(1, IOF_SPI1_SCK);
data = data << 1;
}
// sleep
BIT_PUT(0, IOF_SPI1_SCK);
}
void eos_disp_read(uint8_t *data) {
int i;
*data = 0;
for (i=0; i<8; i++) {
// sleep
BIT_PUT(1, IOF_SPI1_SCK);
*data = *data << 1;
*data |= BIT_GET(IOF_SPI1_MISO);
// sleep
BIT_PUT(0, IOF_SPI1_SCK);
}
}
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