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); } }