OVMS3-idf/examples/peripherals/i2s/README.md

# I2S Example

### This example shows:

Init and using I2S module:
 
* Generate 100Hz triangle wave in a channel, and sine wave in another, with 36Khz sample rates. Change bits per sample every 5 seconds
     
* You can change bits per sample and sample rates with `i2s_set_clk`
I2S: fixed support for 24 and 32-bits, fixed tx/rx at the same time and others in log: Add support 24, 32 bits @jxmao optimize i2s_zero_buffer @jxmao correct config support slave mode @jxmao correct setup pin support tx/rx at the same time Enhance pin power @jxmao add dynamic change number of channels remove nvs_init remove start log and enhance power pin setup using enum for i2s_channel and i2s_bits_per_sample, return ESP_ERR_INVALID_ARG when check params validate i2s_bits_per_sample and channel check tx & rx buffer before fill zero remove checking channel as @jxmao suggest limit dma buffer modify i2s pin back to gpio mux before configure gpio matrix, resolve github issue #512 Add support 24, 32 bits reduce push function Modify sample can test with 24, 32-bits Add i2s sample README Fixed i2s_set_clk got reset sometime can changes bit-wide while running Fix sample rate calculation for DAC mode from @jeroen modify example can change bits per sample every 5 seconds cleanup add comment for bytes_per_sample update as @angus suggestions Add i2s_set_clk api I2S driver bug fixed as following log: @jxmao optimize i2s_zero_buffer @jxmao correct config support slave mode @jxmao correct setup pin support tx/rx at the same time Enhance pin power @jxmao add dynamic change number of channels remove nvs_init remove start log and enhance power pin setup using enum for i2s_channel and i2s_bits_per_sample, return ESP_ERR_INVALID_ARG when check params validate i2s_bits_per_sample and channel check tx & rx buffer before fill zero remove checking channel as @jxmao suggest limit dma buffer modify i2s pin back to gpio mux before configure gpio matrix, resolve github issue #512 limit dma buffer to 4092 change gpio_matrix_*_check to inline function, remove some comments and rename test_i2s function to setup_triangle_sine_waves for change commit title 2017-02-06 06:11:11 +00:00			`# I2S Example`

			`### This example shows:`

			`Init and using I2S module:`

			`* Generate 100Hz triangle wave in a channel, and sine wave in another, with 36Khz sample rates. Change bits per sample every 5 seconds`

			* You can change bits per sample and sample rates with `i2s_set_clk`