void w25q80bv_setup(void)
{
const uint8_t serial_clock_rate = 2;
const uint8_t clock_prescale_rate = 2;
/* Reset SPIFI peripheral before to Erase/Write SPIFI memory through SPI */
RESET_CTRL1 = RESET_CTRL1_SPIFI_RST;
/* Init SPIFI GPIO to Normal GPIO */
scu_pinmux(P3_3, (SCU_SSP_IO | SCU_CONF_FUNCTION2)); // P3_3 SPIFI_SCK => SSP0_SCK
scu_pinmux(P3_4, (SCU_GPIO_FAST | SCU_CONF_FUNCTION0)); // P3_4 SPIFI SPIFI_SIO3 IO3 => GPIO1[14]
scu_pinmux(P3_5, (SCU_GPIO_FAST | SCU_CONF_FUNCTION0)); // P3_5 SPIFI SPIFI_SIO2 IO2 => GPIO1[15]
scu_pinmux(P3_6, (SCU_GPIO_FAST | SCU_CONF_FUNCTION0)); // P3_6 SPIFI SPIFI_MISO IO1 => GPIO0[6]
scu_pinmux(P3_7, (SCU_GPIO_FAST | SCU_CONF_FUNCTION4)); // P3_7 SPIFI SPIFI_MOSI IO0 => GPIO5[10]
scu_pinmux(P3_8, (SCU_GPIO_FAST | SCU_CONF_FUNCTION4)); // P3_8 SPIFI SPIFI_CS => GPIO5[11]
/* configure SSP pins */
scu_pinmux(SCU_SSP0_MISO, (SCU_SSP_IO | SCU_CONF_FUNCTION5));
scu_pinmux(SCU_SSP0_MOSI, (SCU_SSP_IO | SCU_CONF_FUNCTION5));
scu_pinmux(SCU_SSP0_SCK, (SCU_SSP_IO | SCU_CONF_FUNCTION2));
/* configure GPIO pins */
scu_pinmux(SCU_FLASH_HOLD, SCU_GPIO_FAST);
scu_pinmux(SCU_FLASH_WP, SCU_GPIO_FAST);
scu_pinmux(SCU_SSP0_SSEL, (SCU_GPIO_FAST | SCU_CONF_FUNCTION4));
/* drive SSEL, HOLD, and WP pins high */
gpio_set(PORT_FLASH, (PIN_FLASH_HOLD | PIN_FLASH_WP));
gpio_set(PORT_SSP0_SSEL, PIN_SSP0_SSEL);
/* Set GPIO pins as outputs. */
GPIO1_DIR |= (PIN_FLASH_HOLD | PIN_FLASH_WP);
GPIO5_DIR |= PIN_SSP0_SSEL;
/* initialize SSP0 */
ssp_init(SSP0_NUM,
SSP_DATA_8BITS,
SSP_FRAME_SPI,
SSP_CPOL_0_CPHA_0,
serial_clock_rate,
clock_prescale_rate,
SSP_MODE_NORMAL,
SSP_MASTER,
SSP_SLAVE_OUT_ENABLE);
device_id = 0;
while(1)
{
if(device_id == W25Q80BV_DEVICE_ID_RES)
break;
if(device_id == S25FL032P_DEVICE_ID_RES)
break;
device_id = w25q80bv_get_device_id();
}
}
/*
* Set up pins for GPIO and SPI control, configure SSP0 peripheral for SPI.
* SSP0_SSEL is controlled by GPIO in order to handle various transfer lengths.
*/
void w25q80bv_setup(w25q80bv_driver_t* const drv)
{
uint8_t device_id;
drv->page_len = 256U;
drv->num_pages = 4096U;
drv->num_bytes = 1048576U;
drv->target_init(drv);
device_id = 0;
while(device_id != W25Q80BV_DEVICE_ID_RES)
{
device_id = w25q80bv_get_device_id(drv);
}
}
void w25q80bv_chip_erase(w25q80bv_driver_t* const drv)
{
uint8_t device_id;
device_id = 0;
while(device_id != W25Q80BV_DEVICE_ID_RES)
{
device_id = w25q80bv_get_device_id(drv);
}
w25q80bv_write_enable(drv);
w25q80bv_wait_while_busy(drv);
uint8_t data[] = { W25Q80BV_CHIP_ERASE };
spi_bus_transfer(drv->bus, data, ARRAY_SIZE(data));
}
/* write an arbitrary number of bytes */
void w25q80bv_program(w25q80bv_driver_t* const drv, uint32_t addr, uint32_t len, uint8_t* data)
{
uint16_t first_block_len;
uint8_t device_id;
device_id = 0;
while(device_id != W25Q80BV_DEVICE_ID_RES)
{
device_id = w25q80bv_get_device_id(drv);
}
/* do nothing if we would overflow the flash */
if ((len > drv->num_bytes) || (addr > drv->num_bytes)
|| ((addr + len) > drv->num_bytes))
return;
/* handle start not at page boundary */
first_block_len = drv->page_len - (addr % drv->page_len);
if (len < first_block_len)
first_block_len = len;
if (first_block_len) {
w25q80bv_page_program(drv, addr, first_block_len, data);
addr += first_block_len;
data += first_block_len;
len -= first_block_len;
}
/* one page at a time on boundaries */
while (len >= drv->page_len) {
w25q80bv_page_program(drv, addr, drv->page_len, data);
addr += drv->page_len;
data += drv->page_len;
len -= drv->page_len;
}
/* handle end not at page boundary */
if (len) {
w25q80bv_page_program(drv, addr, len, data);
}
}