Hi,
I'm having difficulties driving SDOUT when it's configured to pin 19 on the NRF52840. I can operate the peripheral and see output data when my WS2812_PIN macro is assigned to NRF_GPIO_PIN_MAP(0, 27).
I've confirmed the peripheral itself is still running - I continue to see LRCK and SCK on pins 26, and 25 respectively.
Any suggestions why Pin 19 may be causing me such troubles?
I've attached a copy of my I2S Initialization function.
Thanks,
Hayden
#define WS2182B_PIN NRF_GPIO_PIN_MAP(0, 27) // V0.9 Hw uses incompatible Pin NRF_GPIO_PIN_MAP(0, 19)
// Configure I2S to Appropriate Data Rate and Start It
uint8_t initializeI2S(void) {
// Populate I2S Tx Buffer with all Blanks initially
memset(m_buffer_tx, 0x00, sizeof(m_buffer_tx));
// Set Pin as Output
nrf_gpio_cfg_output(WS2182B_PIN);
// Setup I2S Peripheral. DON'T CHANGE THESE VALUES
nrf_drv_i2s_config_t config = NRF_DRV_I2S_DEFAULT_CONFIG;
// Unused Pins Conflict with ADC Pins
// I2S Will not Operate w/o lrck and sck routed to pins
config.lrck_pin = 26;
config.sck_pin = 25;
config.mck_pin = 0xFF;
config.sdin_pin = 0xFF;
// Assign Values we Care About
config.sdout_pin = WS2182B_PIN;
config.sample_width = NRF_I2S_SWIDTH_16BIT;
config.mck_setup = NRF_I2S_MCK_32MDIV10; // 3.2Mhz / Bit. 800Khz for 4bit words
config.ratio = NRF_I2S_RATIO_32X; // IDEK?
config.channels = NRF_I2S_CHANNELS_STEREO;
// Initialize the Hardware
ret_code_t err_code = nrf_drv_i2s_init(&config, data_handler);
if (err_code != NRF_SUCCESS) {
SEGGER_RTT_WriteString(0, "Can't configure the I2S Peripheral\r\n");
return AXXS_FAILURE;
}
// Start Driving the WS2812B-B
err_code = nrf_drv_i2s_start(&i2sbuf, sizeof(m_buffer_tx), 0);
if (err_code != NRF_SUCCESS) {
SEGGER_RTT_WriteString(0, "Can't Start the I2S Peripheral\r\n");
return AXXS_FAILURE;
}
// Return Success if we Get Here
return AXXS_SUCCESS;
}
