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[ion] ExternalFlash: record the operating mode to avoid sending Single

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SPI command when in Quad SPI mode and vice versa
This commit is contained in:
Émilie Feral
2019-04-10 16:04:32 +02:00
parent ba4d8e6a06
commit 26ea5718b5
1 changed files with 5 additions and 1 deletions
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6
ion/src/device/shared/drivers/external_flash.cpp
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@@ -281,10 +281,12 @@ static void initQSPI() {
QUADSPI.CR()->set(cr);
}
static QUADSPI::CCR::OperatingMode sOperatingMode = QUADSPI::CCR::OperatingMode::Single;
static void initChip() {
/* The chip initially expects commands in SPI mode. We need to use SPI to tell
* it to switch to QPI. */
if (DefaultOperatingMode == QUADSPI::CCR::OperatingMode::Quad) {
if (sOperatingMode == QUADSPI::CCR::OperatingMode::Single && DefaultOperatingMode == QUADSPI::CCR::OperatingMode::Quad) {
send_command(Command::WriteEnable, QUADSPI::CCR::OperatingMode::Single);
ExternalFlashStatusRegister::StatusRegister2 statusRegister2(0);
statusRegister2.setQE(true);
@@ -305,6 +307,7 @@ static void initChip() {
readParameters.setP5(true);
send_write_command(Command::SetReadParameters, reinterpret_cast<uint8_t *>(FlashAddressSpaceSize), reinterpret_cast<uint8_t *>(&readParameters), sizeof(readParameters));
}
sOperatingMode = QUADSPI::CCR::OperatingMode::Quad;
}
set_as_memory_mapped();
}
@@ -331,6 +334,7 @@ static void shutdownChip() {
// Reset
send_command(Command::EnableReset);
send_command(Command::Reset);
sOperatingMode = QUADSPI::CCR::OperatingMode::Single;
Ion::Timing::usleep(30);
// Sleep deep