Add support for 4-byte QSPI flash addressing#295
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trabucayre
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Jan 21, 2023
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| uint8_t tx[5]; | ||
| uint32_t len; | ||
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| if (addr <= 0xffffff) { | ||
| tx[0] = static_cast<uint8_t>(FLASH_SE ); | ||
| tx[1] = static_cast<uint8_t>(0xff & (addr >> 16)); | ||
| tx[2] = static_cast<uint8_t>(0xff & (addr >> 8)); | ||
| tx[3] = static_cast<uint8_t>(0xff & (addr )); | ||
| len = 4; | ||
| } else { | ||
| tx[0] = static_cast<uint8_t>(FLASH_4SE ); | ||
| tx[1] = static_cast<uint8_t>(0xff & (addr >> 24)); | ||
| tx[2] = static_cast<uint8_t>(0xff & (addr >> 16)); | ||
| tx[3] = static_cast<uint8_t>(0xff & (addr >> 8)); | ||
| tx[4] = static_cast<uint8_t>(0xff & (addr )); | ||
| len = 5; | ||
| } | ||
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| _spi->spi_put(tx, NULL, len); | ||
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Owner
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It's looks good but too avoid to many dupplication maybe it's better to do something like (and of course same idea for next modifications):
uint8_t tx[5];
uint32_t len = 0;
uint8_t cmd = (addr <= 0xffffff) ? FLASH_SE : FLASH_4SE;
if (addr <= 0xffffff) {
tx[len++] = static_cast<uint8_t>(cmd );
if (cmd == FLASH_4SE)
tx[len++] = static_cast<uint8_t>(0xff & (addr >> 24));
tx[len++] = static_cast<uint8_t>(0xff & (addr >> 16));
tx[len++] = static_cast<uint8_t>(0xff & (addr >> 8));
tx[len++] = static_cast<uint8_t>(0xff & (addr ));
_spi->spi_put(tx, NULL, len);
Contributor
Author
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I completely agree. Please check the updated version.
To verify that this still works, I've cherry-picked this latest commit on top of my vcu118-flash branch and loaded/dumped a memory file that is larger than 16 MB.
Owner
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Applied thanks @barbedo |
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Refer to #293.