diff options
Diffstat (limited to 'alpha_n25q128.c')
| -rw-r--r-- | alpha_n25q128.c | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/alpha_n25q128.c b/alpha_n25q128.c new file mode 100644 index 0000000..49f713c --- /dev/null +++ b/alpha_n25q128.c @@ -0,0 +1,266 @@ +//-----------------------------------------------------------------------------
+// alpha_n25q128.c
+//-----------------------------------------------------------------------------
+
+
+//-----------------------------------------------------------------------------
+// Headers
+//-----------------------------------------------------------------------------
+#include "stm32f4xx_hal.h"
+#include "alpha_n25q128.h"
+#include "spi.h"
+
+
+//-----------------------------------------------------------------------------
+int n25q128_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;
+}
+
+
+//-----------------------------------------------------------------------------
+int n25q128_read_page(uint32_t page_offset, uint8_t *page_buffer)
+//-----------------------------------------------------------------------------
+{
+ // 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;
+}
+
+
+//-----------------------------------------------------------------------------
+int n25q128_write_page(uint32_t page_offset, uint8_t *page_buffer)
+//-----------------------------------------------------------------------------
+{
+ // 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;
+ }
+
+ // 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);
+}
+
+//-----------------------------------------------------------------------------
+// End-of-File
+//-----------------------------------------------------------------------------
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