diff options
Diffstat (limited to 'spiflash_n25q128.c')
| -rw-r--r-- | spiflash_n25q128.c | 57 |
1 files changed, 52 insertions, 5 deletions
diff --git a/spiflash_n25q128.c b/spiflash_n25q128.c index c23f244..68f96f1 100644 --- a/spiflash_n25q128.c +++ b/spiflash_n25q128.c @@ -6,7 +6,7 @@ * The Alpha board has two of these SPI flash memorys, the FPGA config memory * and the keystore memory. * - * Copyright (c) 2016, NORDUnet A/S All rights reserved. + * Copyright (c) 2016-2017, NORDUnet A/S All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are @@ -35,9 +35,7 @@ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -#include "stm32f4xx_hal.h" -#include "stm-fpgacfg.h" -#include "stm-init.h" +#include "spiflash_n25q128.h" #define _n25q128_select(ctx) HAL_GPIO_WritePin(ctx->cs_n_port, ctx->cs_n_pin, GPIO_PIN_RESET); #define _n25q128_deselect(ctx) HAL_GPIO_WritePin(ctx->cs_n_port, ctx->cs_n_pin, GPIO_PIN_SET); @@ -222,7 +220,7 @@ inline int _wait_while_wip(struct spiflash_ctx *ctx, uint32_t timeout) int i; while (timeout--) { i = n25q128_get_wip_flag(ctx); - if (i < 0) return 0; + if (i < 0) return 0; // impossible if (! i) break; HAL_Delay(10); } @@ -294,6 +292,54 @@ int n25q128_erase_subsector(struct spiflash_ctx *ctx, uint32_t subsector_offset) } +int n25q128_erase_bulk(struct spiflash_ctx *ctx) +{ + // tx buffer + uint8_t spi_tx[1]; + + // result + HAL_StatusTypeDef ok; + + // enable writing + spi_tx[0] = N25Q128_COMMAND_WRITE_ENABLE; + + // select, send command, deselect + _n25q128_select(ctx); + ok = HAL_SPI_Transmit(ctx->hspi, spi_tx, 1, N25Q128_SPI_TIMEOUT); + HAL_Delay(1); + _n25q128_deselect(ctx); + + // check + if (ok != HAL_OK) return 0; + + // make sure, that write enable did the job + int wel = _n25q128_get_wel_flag(ctx); + if (wel != 1) return 0; + + // send command + spi_tx[0] = N25Q128_COMMAND_ERASE_BULK; + + // activate, send command, deselect + _n25q128_select(ctx); + ok = HAL_SPI_Transmit(ctx->hspi, spi_tx, 1, N25Q128_SPI_TIMEOUT); + HAL_Delay(1); + _n25q128_deselect(ctx); + + // check + if (ok != HAL_OK) return 0; + + // wait for erase to finish + + if (! _wait_while_wip(ctx, 60000)) return 0; + + // done + return 1; +} + + +/* + * Read the Write Enable Latch bit in the status register. + */ int _n25q128_get_wel_flag(struct spiflash_ctx *ctx) { // tx, rx buffers @@ -319,6 +365,7 @@ int _n25q128_get_wel_flag(struct spiflash_ctx *ctx) return ((spi_rx[1] >> 1) & 1); } + /* This function performs erasure if needed, and then writing of a number of pages to the flash memory */ int n25q128_write_data(struct spiflash_ctx *ctx, uint32_t offset, const uint8_t *buf, const uint32_t len, const int auto_erase) { |