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mimxrt10xx: busio: cap SPI baudrate at 30MHz per datasheet

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This commit is contained in:
Jeff Epler 2021-03-25 13:37:37 -05:00
parent 155b61f027
commit 9e110f120a
1 changed files with 4 additions and 0 deletions
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4
ports/mimxrt10xx/common-hal/busio/SPI.c
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@ -234,6 +234,10 @@ void common_hal_busio_spi_deinit(busio_spi_obj_t *self) {
bool common_hal_busio_spi_configure(busio_spi_obj_t *self,
uint32_t baudrate, uint8_t polarity, uint8_t phase, uint8_t bits) {
if (baudrate > 30000000) {
baudrate = 30000000; // "Absolute maximum frequency of operation (fop) is 30 MHz" -- IMXRT1010CEC.pdf
}
LPSPI_Enable(self->spi, false);
uint32_t tcrPrescaleValue;
self->baudrate = LPSPI_MasterSetBaudRate(self->spi, baudrate, LPSPI_MASTER_CLK_FREQ, &tcrPrescaleValue);