uint8_t u8g_com_esp8266_hw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
{
switch(msg)
{
case U8G_COM_MSG_STOP:
break;
case U8G_COM_MSG_INIT:
// we assume that the SPI interface was already initialized
// just care for the /CS and D/C pins
lu8g_digital_write( u8g, U8G_PI_CS, PLATFORM_GPIO_HIGH );
platform_gpio_mode( u8g->pin_list[U8G_PI_CS], PLATFORM_GPIO_OUTPUT, PLATFORM_GPIO_FLOAT );
platform_gpio_mode( u8g->pin_list[U8G_PI_A0], PLATFORM_GPIO_OUTPUT, PLATFORM_GPIO_FLOAT );
break;
case U8G_COM_MSG_ADDRESS: /* define cmd (arg_val = 0) or data mode (arg_val = 1) */
lu8g_digital_write( u8g, U8G_PI_A0, arg_val == 0 ? PLATFORM_GPIO_LOW : PLATFORM_GPIO_HIGH );
break;
case U8G_COM_MSG_CHIP_SELECT:
if (arg_val == 0)
{
/* disable */
lu8g_digital_write( u8g, U8G_PI_CS, PLATFORM_GPIO_HIGH );
}
else
{
/* enable */
//u8g_com_arduino_digital_write(u8g, U8G_PI_SCK, LOW);
lu8g_digital_write( u8g, U8G_PI_CS, PLATFORM_GPIO_LOW );
}
break;
case U8G_COM_MSG_RESET:
if ( u8g->pin_list[U8G_PI_RESET] != U8G_PIN_NONE )
lu8g_digital_write( u8g, U8G_PI_RESET, arg_val == 0 ? PLATFORM_GPIO_LOW : PLATFORM_GPIO_HIGH );
break;
case U8G_COM_MSG_WRITE_BYTE:
platform_spi_send( 1, 8, arg_val );
break;
case U8G_COM_MSG_WRITE_SEQ:
case U8G_COM_MSG_WRITE_SEQ_P:
{
register uint8_t *ptr = arg_ptr;
while( arg_val > 0 )
{
platform_spi_send( 1, 8, *ptr++ );
arg_val--;
}
}
break;
}
return 1;
}
static int16_t ucg_com_esp8266_hw_spi(ucg_t *ucg, int16_t msg, uint16_t arg, uint8_t *data)
{
switch(msg)
{
case UCG_COM_MSG_POWER_UP:
/* "data" is a pointer to ucg_com_info_t structure with the following information: */
/* ((ucg_com_info_t *)data)->serial_clk_speed value in nanoseconds */
/* ((ucg_com_info_t *)data)->parallel_clk_speed value in nanoseconds */
/* setup pins */
// we assume that the SPI interface was already initialized
// just care for the /CS and D/C pins
//platform_gpio_write( ucg->pin_list[0], value );
if ( ucg->pin_list[UCG_PIN_RST] != UCG_PIN_VAL_NONE )
platform_gpio_mode( ucg->pin_list[UCG_PIN_RST], PLATFORM_GPIO_OUTPUT, PLATFORM_GPIO_FLOAT );
platform_gpio_mode( ucg->pin_list[UCG_PIN_CD], PLATFORM_GPIO_OUTPUT, PLATFORM_GPIO_FLOAT );
if ( ucg->pin_list[UCG_PIN_CS] != UCG_PIN_VAL_NONE )
platform_gpio_mode( ucg->pin_list[UCG_PIN_CS], PLATFORM_GPIO_OUTPUT, PLATFORM_GPIO_FLOAT );
break;
case UCG_COM_MSG_POWER_DOWN:
break;
case UCG_COM_MSG_DELAY:
delayMicroseconds(arg);
break;
case UCG_COM_MSG_CHANGE_RESET_LINE:
if ( ucg->pin_list[UCG_PIN_RST] != UCG_PIN_VAL_NONE )
platform_gpio_write( ucg->pin_list[UCG_PIN_RST], arg );
break;
case UCG_COM_MSG_CHANGE_CS_LINE:
if ( ucg->pin_list[UCG_PIN_CS] != UCG_PIN_VAL_NONE )
platform_gpio_write( ucg->pin_list[UCG_PIN_CS], arg );
break;
case UCG_COM_MSG_CHANGE_CD_LINE:
platform_gpio_write( ucg->pin_list[UCG_PIN_CD], arg );
break;
case UCG_COM_MSG_SEND_BYTE:
platform_spi_send( 1, 8, arg );
break;
case UCG_COM_MSG_REPEAT_1_BYTE:
CACHED_TRANSFER(data[0], 1);
break;
case UCG_COM_MSG_REPEAT_2_BYTES:
CACHED_TRANSFER((data[0] << 8) | data[1], 2);
break;
case UCG_COM_MSG_REPEAT_3_BYTES:
while( arg > 0 ) {
platform_spi_transaction( 1, 0, 0, 24, (data[0] << 16) | (data[1] << 8) | data[2], 0, 0, 0 );
arg--;
}
break;
case UCG_COM_MSG_SEND_STR:
CACHED_TRANSFER(*data++, 1);
break;
case UCG_COM_MSG_SEND_CD_DATA_SEQUENCE:
while(arg > 0)
{
if ( *data != 0 )
{
/* set the data line directly, ignore the setting from UCG_CFG_CD */
if ( *data == 1 )
{
platform_gpio_write( ucg->pin_list[UCG_PIN_CD], 0 );
}
else
{
platform_gpio_write( ucg->pin_list[UCG_PIN_CD], 1 );
}
}
data++;
platform_spi_send( 1, 8, *data );
data++;
arg--;
}
break;
}
return 1;
}