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-rw-r--r--stm-fpgacfg.c267
1 files changed, 21 insertions, 246 deletions
diff --git a/stm-fpgacfg.c b/stm-fpgacfg.c
index 0d255e5..f8ff6fa 100644
--- a/stm-fpgacfg.c
+++ b/stm-fpgacfg.c
@@ -38,259 +38,34 @@
SPI_HandleTypeDef hspi_fpgacfg;
-int _n25q128_get_wel_flag(void);
+struct spiflash_ctx fpgacfg_ctx = {&hspi_fpgacfg, PROM_CS_N_GPIO_Port, PROM_CS_N_Pin};
-
-int n25q128_check_id()
+int fpgacfg_check_id()
{
- // tx, rx buffers
- uint8_t spi_tx[4];
- uint8_t spi_rx[4];
-
- // result
- HAL_StatusTypeDef ok;
-
- // send READ ID command
- spi_tx[0] = N25Q128_COMMAND_READ_ID;
-
- // select, send command & read response, deselect
- _n25q128_select();
- ok = HAL_SPI_TransmitReceive(N25Q128_SPI_HANDLE, spi_tx, spi_rx, 4, N25Q128_SPI_TIMEOUT);
- HAL_Delay(1);
- _n25q128_deselect();
-
- // check
- if (ok != HAL_OK) return 0;
-
- // parse response (note, that the very first byte was received during the
- // transfer of the command byte, so it contains garbage and should
- // be ignored here)
- if (spi_rx[1] != N25Q128_ID_MANUFACTURER) return 0;
- if (spi_rx[2] != N25Q128_ID_DEVICE_TYPE) return 0;
- if (spi_rx[3] != N25Q128_ID_DEVICE_CAPACITY) return 0;
-
- // done
- return 1;
+ return n25q128_check_id(&fpgacfg_ctx);
}
-
-int n25q128_read_page(uint32_t page_offset, uint8_t *page_buffer)
+int fpgacfg_write_data(uint32_t offset, const uint8_t *buf, const uint32_t len)
{
- // tx buffer
- uint8_t spi_tx[4];
-
- // result
- HAL_StatusTypeDef ok;
-
- // check offset
- if (page_offset >= N25Q128_NUM_PAGES) return 0;
-
- // calculate byte address
- page_offset *= N25Q128_PAGE_SIZE;
-
- // prepare READ command
- spi_tx[0] = N25Q128_COMMAND_READ_PAGE;
- spi_tx[1] = (uint8_t)(page_offset >> 16);
- spi_tx[2] = (uint8_t)(page_offset >> 8);
- spi_tx[3] = (uint8_t)(page_offset >> 0);
-
- // activate, send command
- _n25q128_select();
- ok = HAL_SPI_Transmit(N25Q128_SPI_HANDLE, spi_tx, 4, N25Q128_SPI_TIMEOUT);
- HAL_Delay(1);
-
- // check
- if (ok != HAL_OK) {
- _n25q128_deselect();
- return 0;
- }
-
- // read response, deselect
- ok = HAL_SPI_Receive(N25Q128_SPI_HANDLE, page_buffer, N25Q128_PAGE_SIZE, N25Q128_SPI_TIMEOUT);
- HAL_Delay(1);
- _n25q128_deselect();
-
- // check
- if (ok != HAL_OK) return 0;
-
- // done
- return 1;
+ return n25q128_write_data(&fpgacfg_ctx, offset, buf, len);
}
-
-int n25q128_write_page(uint32_t page_offset, uint8_t *page_buffer)
+void fpgacfg_access_control(enum fpgacfg_access_ctrl access)
{
- // tx buffer
- uint8_t spi_tx[4];
-
- // result
- HAL_StatusTypeDef ok;
-
- // check offset
- if (page_offset >= N25Q128_NUM_PAGES) return 0;
-
- // enable writing
- spi_tx[0] = N25Q128_COMMAND_WRITE_ENABLE;
-
- // activate, send command, deselect
- _n25q128_select();
- ok = HAL_SPI_Transmit(N25Q128_SPI_HANDLE, spi_tx, 1, N25Q128_SPI_TIMEOUT);
- HAL_Delay(1);
- _n25q128_deselect();
-
- // check
- if (ok != HAL_OK) return 0;
-
- // make sure, that write enable did the job
- int wel = _n25q128_get_wel_flag();
- if (wel != 1) return 0;
-
- // calculate byte address
- page_offset *= N25Q128_PAGE_SIZE;
-
- // prepare PROGRAM PAGE command
- spi_tx[0] = N25Q128_COMMAND_PAGE_PROGRAM;
- spi_tx[1] = (uint8_t)(page_offset >> 16);
- spi_tx[2] = (uint8_t)(page_offset >> 8);
- spi_tx[3] = (uint8_t)(page_offset >> 0);
-
- // activate, send command
- _n25q128_select();
- ok = HAL_SPI_Transmit(N25Q128_SPI_HANDLE, spi_tx, 4, N25Q128_SPI_TIMEOUT);
- HAL_Delay(1);
-
- // check
- if (ok != HAL_OK) {
- _n25q128_deselect();
- return 0;
+ if (access == ALLOW_ARM) {
+ // fpga disable = 1
+ HAL_GPIO_WritePin(PROM_FPGA_DIS_GPIO_Port, PROM_FPGA_DIS_Pin, GPIO_PIN_SET);
+ // arm enable = 0
+ HAL_GPIO_WritePin(GPIOF, PROM_ARM_ENA_Pin, GPIO_PIN_RESET);
+ } else if (access == ALLOW_FPGA) {
+ // fpga disable = 0
+ HAL_GPIO_WritePin(PROM_FPGA_DIS_GPIO_Port, PROM_FPGA_DIS_Pin, GPIO_PIN_RESET);
+ // arm enable = 1
+ HAL_GPIO_WritePin(GPIOF, PROM_ARM_ENA_Pin, GPIO_PIN_SET);
+ } else {
+ // fpga disable = 1
+ HAL_GPIO_WritePin(PROM_FPGA_DIS_GPIO_Port, PROM_FPGA_DIS_Pin, GPIO_PIN_SET);
+ // arm enable = 1
+ HAL_GPIO_WritePin(GPIOF, PROM_ARM_ENA_Pin, GPIO_PIN_SET);
}
-
- // send data, deselect
- ok = HAL_SPI_Transmit(N25Q128_SPI_HANDLE, page_buffer, N25Q128_PAGE_SIZE, N25Q128_SPI_TIMEOUT);
- HAL_Delay(1);
- _n25q128_deselect();
-
- // check
- if (ok != HAL_OK) return 0;
-
- // done
- return 1;
-}
-
-
-int n25q128_get_wip_flag(void)
-{
- // tx, rx buffers
- uint8_t spi_tx[2];
- uint8_t spi_rx[2];
-
- // result
- HAL_StatusTypeDef ok;
-
- // send READ STATUS command
- spi_tx[0] = N25Q128_COMMAND_READ_STATUS;
-
- // send command, read response, deselect
- _n25q128_select();
- ok = HAL_SPI_TransmitReceive(N25Q128_SPI_HANDLE, spi_tx, spi_rx, 2, N25Q128_SPI_TIMEOUT);
- HAL_Delay(1);
- _n25q128_deselect();
-
- // check
- if (ok != HAL_OK) return -1;
-
- // done
- return (spi_rx[1] & 1);
-}
-
-
-int n25q128_erase_sector(uint32_t sector_offset)
-{
- // tx buffer
- uint8_t spi_tx[4];
-
- // result
- HAL_StatusTypeDef ok;
-
- // check offset
- if (sector_offset >= N25Q128_NUM_SECTORS) return 0;
-
- // enable writing
- spi_tx[0] = N25Q128_COMMAND_WRITE_ENABLE;
-
- // select, send command, deselect
- _n25q128_select();
- ok = HAL_SPI_Transmit(N25Q128_SPI_HANDLE, spi_tx, 1, N25Q128_SPI_TIMEOUT);
- HAL_Delay(1);
- _n25q128_deselect();
-
- // check
- if (ok != HAL_OK) return 0;
-
- // make sure, that write enable did the job
- int wel = _n25q128_get_wel_flag();
- if (wel != 1) return 0;
-
- // calculate byte address
- sector_offset *= N25Q128_SECTOR_SIZE;
-
- // send ERASE SUBSECTOR command
- spi_tx[0] = N25Q128_COMMAND_ERASE_SECTOR;
- spi_tx[1] = (uint8_t)(sector_offset >> 16);
- spi_tx[2] = (uint8_t)(sector_offset >> 8);
- spi_tx[3] = (uint8_t)(sector_offset >> 0);
-
- // activate, send command, deselect
- _n25q128_select();
- ok = HAL_SPI_Transmit(N25Q128_SPI_HANDLE, spi_tx, 4, N25Q128_SPI_TIMEOUT);
- HAL_Delay(1);
- _n25q128_deselect();
-
- // check
- if (ok != HAL_OK) return 0;
-
- // done
- return 1;
-}
-
-
-int _n25q128_get_wel_flag(void)
-{
- // tx, rx buffers
- uint8_t spi_tx[2];
- uint8_t spi_rx[2];
-
- // result
- HAL_StatusTypeDef ok;
-
- // send READ STATUS command
- spi_tx[0] = N25Q128_COMMAND_READ_STATUS;
-
- // send command, read response, deselect
- _n25q128_select();
- ok = HAL_SPI_TransmitReceive(N25Q128_SPI_HANDLE, spi_tx, spi_rx, 2, N25Q128_SPI_TIMEOUT);
- HAL_Delay(1);
- _n25q128_deselect();
-
- // check
- if (ok != HAL_OK) return -1;
-
- // done
- return ((spi_rx[1] >> 1) & 1);
-}
-
-void fpgacfg_give_access_to_stm32()
-{
- // fpga disable = 1
- HAL_GPIO_WritePin(GPIOI, GPIO_PIN_14, GPIO_PIN_SET);
- // arm enable = 0
- HAL_GPIO_WritePin(GPIOF, GPIO_PIN_6, GPIO_PIN_RESET);
-}
-
-void fpgacfg_give_access_to_fpga()
-{
- // fpga disable = 0
- HAL_GPIO_WritePin(GPIOI, GPIO_PIN_14, GPIO_PIN_RESET);
- // arm enable = 1
- HAL_GPIO_WritePin(GPIOF, GPIO_PIN_6, GPIO_PIN_SET);
}
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