hwdef: disable I2C DMA on Pixhawk6X

this prevents an issue with the BMI088 and external compass on GPS1
SharSam · Aug 2, 2022 · 949ef22 · 949ef22
1 parent 01e6809
commit 949ef22
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/Pixhawk6X/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/Pixhawk6X/hwdef.dat
@@ -200,6 +200,12 @@ PF15 I2C4_SDA I2C4
 I2C_ORDER I2C4 I2C1 I2C2 I2C3
 define HAL_I2C_INTERNAL_MASK 1
 
+# this board is very tight on DMA channels. To allow for more UART DMA
+# we disable DMA on I2C. This also prevents a problem with DMA on I2C
+# interfering with IMUs
+NODMA I2C*
+define STM32_I2C_USE_DMA FALSE
+
 # heater
 PB10 HEATER_EN OUTPUT LOW GPIO(80)
 define HAL_HEATER_GPIO_PIN 80