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nrf: allocate two I2C on CPB

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This commit is contained in:
Dan Halbert 2019-10-28 21:08:53 -04:00
parent 56ac41fabf
commit e35eb08f1d
2 changed files with 31 additions and 9 deletions
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7
ports/nrf/boards/circuitplayground_bluefruit/mpconfigboard.mk
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@ -24,3 +24,10 @@ NRF_DEFINES += -DNRF52840_XXAA -DNRF52840
QSPI_FLASH_FILESYSTEM = 1
EXTERNAL_FLASH_DEVICE_COUNT = 1
EXTERNAL_FLASH_DEVICES = "GD25Q16C"
# Allocate two, not just one I2C peripheral for CPB, so that we have both
# on-board and off-board I2C available.
# When SPIM3 becomes available we'll be able to have two I2C and two SPI peripherals.
# We use a CFLAGS define here because there are include order issues
# if we try to include "mpconfigport.h" into nrfx_config.h .
CFLAGS += -DCIRCUITPY_NRF_NUM_I2C=2

33
ports/nrf/nrfx_config.h
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@ -5,12 +5,9 @@
#define NRFX_POWER_ENABLED 1
#define NRFX_POWER_CONFIG_IRQ_PRIORITY 7
// Turn on nrfx supported workarounds for errata in Rev1/Rev2 of nRF52832
#ifdef NRF52832_XXAA
#define NRFX_SPIS_NRF52_ANOMALY_109_WORKAROUND_ENABLED 1
#endif
// NOTE: THIS WORKAROUND CAUSES BLE CODE TO CRASH; tested on 2019-03-11.
// NOTE: THIS WORKAROUND CAUSES BLE CODE TO CRASH.
// It doesn't work with the SoftDevice.
// See https://devzone.nordicsemi.com/f/nordic-q-a/33982/sdk-15-software-crash-during-spi-session
// Turn on nrfx supported workarounds for errata in Rev1 of nRF52840
#ifdef NRF52840_XXAA
// #define NRFX_SPIM3_NRF52840_ANOMALY_198_WORKAROUND_ENABLED 1
@ -24,11 +21,26 @@
// so out of the box TWIM0/SPIM0 and TWIM1/SPIM1 cannot be shared
// between common-hal/busio/I2C.c and SPI.c.
// We could write an interrupt handler that checks whether it's
// being used for SPI or I2C, but perhaps two I2C's and 1-2 SPI's are good enough for now.
// being used for SPI or I2C, but perhaps one I2C and two SPI or two I2C and one SPI
// are good enough for now.
// CIRCUITPY_NRF_NUM_I2C is 1 or 2 to choose how many I2C (TWIM) peripherals
// to provide.
// This can go away once we have SPIM3 working: then we can have two
// I2C and two SPI.
#ifndef CIRCUITPY_NRF_NUM_I2C
#define CIRCUITPY_NRF_NUM_I2C 1
#endif
#if CIRCUITPY_NRF_NUM_I2C != 1 && CIRCUITPY_NRF_NUM_I2C != 2
# error CIRCUITPY_NRF_NUM_I2C must be 1 or 2
#endif
// Enable SPIM1, SPIM2 and SPIM3 (if available)
// No conflict with TWIM0.
#if CIRCUITPY_NRF_NUM_I2C == 1
#define NRFX_SPIM1_ENABLED 1
#endif
#define NRFX_SPIM2_ENABLED 1
// DON'T ENABLE SPIM3 DUE TO ANOMALY WORKAROUND FAILURE (SEE ABOVE).
// #ifdef NRF52840_XXAA
@ -45,10 +57,13 @@
// QSPI
#define NRFX_QSPI_ENABLED 1
// TWI aka. I2C; enable a single bus: TWIM0 (no conflict with SPIM1 and SPIM2)
// TWI aka. I2C; always enable TWIM0 (no conflict with SPIM1 and SPIM2)
#define NRFX_TWIM_ENABLED 1
#define NRFX_TWIM0_ENABLED 1
//#define NRFX_TWIM1_ENABLED 1
#if CIRCUITPY_NRF_NUM_I2C == 2
#define NRFX_TWIM1_ENABLED 1
#endif
#define NRFX_TWIM_DEFAULT_CONFIG_IRQ_PRIORITY 7
#define NRFX_TWIM_DEFAULT_CONFIG_FREQUENCY NRF_TWIM_FREQ_400K