Hi!
First of all, I'm using the nrf52 PCA 10040 DK, with SDK11.0.0, and my Soft Device is 132 2.0.2.
I'm developing an app for comunicating with a sensor via SPI (send commands and data, and recieve data), and also, share information via Bluetooth with other boards.
The first step I made was create a library for encrypting data and orders, send it via SPI, and decrypt responses. In my aplication, I need to store some data permanently in the flash, so I used the example for writing and read data in the flash provided in the SDK, in particular, I use these functions:
static void flash_page_erase(uint32_t * page_address){
// Turn on flash erase enable and wait until the NVMC is ready:
NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Een << NVMC_CONFIG_WEN_Pos);
while (NRF_NVMC->READY == NVMC_READY_READY_Busy){
// Do nothing.
}
// Erase page:
NRF_NVMC->ERASEPAGE = (uint32_t)page_address;
while (NRF_NVMC->READY == NVMC_READY_READY_Busy){
// Do nothing.
}
// Turn off flash erase enable and wait until the NVMC is ready:
NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos);
while (NRF_NVMC->READY == NVMC_READY_READY_Busy){
// Do nothing.
}}
and:
static void flash_word_write(uint32_t * address, uint32_t value){
// Turn on flash write enable and wait until the NVMC is ready:
NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Wen << NVMC_CONFIG_WEN_Pos);
while (NRF_NVMC->READY == NVMC_READY_READY_Busy){
// Do nothing.
}
*address = value;
nrf_delay_ms(1); //en el peor caso esta operación tarda 338us
while (NRF_NVMC->READY == NVMC_READY_READY_Busy){
// Do nothing.
}
// Turn off flash write enable and wait until the NVMC is ready:
NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos);
while (NRF_NVMC->READY == NVMC_READY_READY_Busy){
// Do nothing.
}}
With this, my application works perfectly.
I include SD, it's activated in the main, the next step is the reset of the sensor module, and erase a page of the flash. The application makes the reset on the module, but after that, doesn't erase the page in the flash, and jump back tho the line where the reset of the module is performed, I mean, it seems like the application enters a loop, I've noticed that the program counter decreases when arrives to the flash page erase line.
I think I don't overlap memory with the Soft Device, application memory and data memory
this is a sample of the code:
configura_gpios_placa();
ble_stack_init();
//initialize the SPI
nrf_drv_spi_config_t spi_config = NRF_DRV_SPI_DEFAULT_CONFIG(SPI_INSTANCE);
spi_config.ss_pin = SPI_CS_PIN;
mensaje = nrf_drv_spi_init(&spi, &spi_config, spi_event_handler);
//reset of the m_rx_buf and the module
memset(m_rx_buf, 0, m_length);
nrf_delay_ms(500);
nrf_gpio_cfg_output(31);
nrf_gpio_pin_write(31,0);
nrf_delay_ms(250);
nrf_gpio_pin_write(31,1);
nrf_delay_ms(500);
spi_xfer_done = false;
//initialize the RNG
inicializar_rng();
empieza_reset(); //functions for turn on the 4 LEDs to indicate the reset process
factory_reset(); //reset of the sensor
recibir_respuesta_datos_auth(data, verify_auth); //recieve if the reset was succesful
direccion = (uint32_t *) 0x0007f000; //adress of the las page in flash
flash_page_erase(direccion);
nrf_delay_ms(90);
So, if I want to save and read data on the flash memory, or erase data, when I use the Soft Device, what library should I use? There is some example?
Thanks guys!
