I have made more test, with some knowed data at the beginning of the SPI buffer and I can read it, the data lost are at the end of the buffer

I have also try to shift my receive buffer to see if I receive the whole data with: epf_error_t USC_read_8bline_auto(int nbpoint, int offset) { int ret=0; epf_error_t err = EPF_ERR_NOERROR; printf("number of points: %i\n", nbpoint); spi_transaction_t t; memset(&t, 0, sizeof(t)); t.length=0; t.tx_buf...

Hi ESP_Sprite,

I do my CS in soft because in need two CS line with this device, one to telling it that it will have to read from the SPI, the second to tell him that it will write on the SPI. To improve efficiency, I will include the reading CS line in the spi_bus_config_t structure latter.

Hi all, I am trying to read data from a device on SPI bus using DMA. This device work in half_duplex only. I want to read successively large amount of data considering the ESP is the master. So I initialise the spi with: #define SPI_MOSI 23 #define SPI_MISO 19 #define SPI_CLK 18 #define SPI_COM_SPEE...