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Update W25N01G driver to work with floating /WP pin in SPI mode (#9056) 

Update W25N01G driver to work with floating /WP pin in SPI mode
This commit is contained in:
Michael Keller 2019-10-20 13:04:59 +13:00 committed by GitHub
parent cb9481b137 8cc5fb951c
commit 90163f4c4a
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1 changed files with 18 additions and 17 deletions
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35
src/main/drivers/flash_w25n01g.c
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@ -85,11 +85,22 @@ serialPort_t *debugSerialPort = NULL;
#define W25N01G_INSTRUCTION_FAST_READ 0x1B
#define W25N01G_INSTRUCTION_FAST_READ_QUAD_OUTPUT 0x6B
// Configu/status register addresses
// Config/status register addresses
#define W25N01G_PROT_REG 0xA0
#define W25N01G_CONF_REG 0xB0
#define W25N01G_STAT_REG 0xC0
// Bits in config/status register 1 (W25N01G_PROT_REG)
#define W25N01G_PROT_CLEAR (0)
#define W25N01G_PROT_SRP1_ENABLE (1 << 0)
#define W25N01G_PROT_WP_E_ENABLE (1 << 1)
#define W25N01G_PROT_TB_ENABLE (1 << 2)
#define W25N01G_PROT_PB0_ENABLE (1 << 3)
#define W25N01G_PROT_PB1_ENABLE (1 << 4)
#define W25N01G_PROT_PB2_ENABLE (1 << 5)
#define W25N01G_PROT_PB3_ENABLE (1 << 6)
#define W25N01G_PROT_SRP2_ENABLE (1 << 7)
// Bits in config/status register 2 (W25N01G_CONF_REG)
#define W25N01G_CONFIG_ECC_ENABLE (1 << 4)
#define W25N01G_CONFIG_BUFFER_READ_MODE (1 << 3)
@ -250,20 +261,10 @@ static void w25n01g_deviceReset(flashDevice_t *fdevice)
// Protection for upper 1/32 (BP[3:0] = 0101, TB=0), WP-E on; to protect bad block replacement area
// DON'T DO THIS. This will prevent writes through the bblut as well.
// w25n01g_writeRegister(busdev, W25N01G_PROT_REG, (5 << 3)|(0 << 2)|(1 << 1));
// w25n01g_writeRegister(busdev, W25N01G_PROT_REG, W25N01G_PROT_PB0_ENABLE|W25N01G_PROT_PB2_ENABLE|W25N01G_PROT_WP_E_ENABLE);
uint8_t value = (0 << 3)|(0 << 2); // No protection
if (io->mode == FLASHIO_SPI) {
value |= (1 << 1); // WP-E on
}
#ifdef USE_QUADSPI
else if (io->mode == FLASHIO_QUADSPI) {
value |= (0 << 1); // WP-E off, WP-E prevents use of IO2
}
#endif
w25n01g_writeRegister(io, W25N01G_PROT_REG, value);
// No protection, WP-E off, WP-E prevents use of IO2
w25n01g_writeRegister(io, W25N01G_PROT_REG, W25N01G_PROT_CLEAR);
// Buffered read mode (BUF = 1), ECC enabled (ECC = 1)
w25n01g_writeRegister(io, W25N01G_CONF_REG, W25N01G_CONFIG_ECC_ENABLE|W25N01G_CONFIG_BUFFER_READ_MODE);
@ -390,10 +391,10 @@ bool w25n01g_detect(flashDevice_t *fdevice, uint32_t chipID)
#if 0
// Protection to upper 1/32 (BP[3:0] = 0101, TB=0), WP-E on
//w25n01g_writeRegister(fdevice->handle.busdev, W25N01G_PROT_REG, (5 << 3)|(0 << 2)|(1 << 1));
//w25n01g_writeRegister(fdevice->handle.busdev, W25N01G_PROT_REG, W25N01G_PROT_PB0_ENABLE|W25N01G_PROT_PB2_ENABLE|W25N01G_PROT_WP_E_ENABLE);
// No protection, WP-E on
w25n01g_writeRegister(fdevice->handle, W25N01G_PROT_REG, (0 << 3)|(0 << 2)|(1 << 1));
// No protection, WP-E off
w25n01g_writeRegister(fdevice->handle, W25N01G_PROT_REG, W25N01G_PROT_CLEAR);
// Continuous mode (BUF = 0), ECC enabled (ECC = 1)
w25n01g_writeRegister(fdevice->handle, W25N01G_CONF_REG, W25N01G_CONFIG_ECC_ENABLE);