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HAL_ChibiOS: setup dummy pointers for H7 SPI

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This commit is contained in:
Andrew Tridgell 2019-03-10 20:32:32 +11:00
parent 249676ca32
commit 63895d8b0c
1 changed files with 7 additions and 0 deletions
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7
libraries/AP_HAL_ChibiOS/SPIDevice.cpp
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@ -323,6 +323,13 @@ bool SPIDevice::acquire_bus(bool set, bool skip_cs)
#if defined(STM32H7)
bus.spicfg.cfg1 = freq_flag;
bus.spicfg.cfg2 = device_desc.mode;
if (bus.spicfg.dummytx == nullptr) {
bus.spicfg.dummytx = (uint32_t *)malloc_dma(4);
memset(bus.spicfg.dummytx, 0xFF, 4);
}
if (bus.spicfg.dummyrx == nullptr) {
bus.spicfg.dummyrx = (uint32_t *)malloc_dma(4);
}
#else
bus.spicfg.cr1 = (uint16_t)(freq_flag | device_desc.mode);
bus.spicfg.cr2 = 0;