adriendesp commented on code in PR #16923:
URL: https://github.com/apache/nuttx/pull/16923#discussion_r2309532388
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arch/arm/src/xmc4/Kconfig:
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@@ -605,6 +657,32 @@ config XMC4_USIC2_CHAN1_ISI2S
Configure USIC2 Channel 1 for I2S audio
endchoice # USIC2 Channel 1 Protocol
+config XMC4_USIC2_CHAN0_TX_BUFFER_SIZE
+ int "Channel 0 Tx FIFO Buffer Size (non-UART)"
+ depends on !XMC4_USIC2_CHAN0_ISUART
+ default 16
+ ---help---
+ USIC2_CHAN0 is not an UART but user can still set the desired
offsets
+ for CHAN1 TX in USIC2 FIFIO buffer. The buffer is mapped as
follow :
+ CHAN0_TX[CHAN0_TX_BUFFER_SIZE] -
CHAN0_RX[CHAN10_RX_BUFFER_SIZE] - CHAN1_TX[CHAN2_TX_BUFFER_SIZE] -
CHAN1_RX[CHAN2_RX_BUFFER_SIZE]
+
+ Should be a power of 2 between 2 and 64
+ The sum of Rx and Tx buffers sizes of both
+ channels should be inferior to 64
+
+config XMC4_USIC2_CHAN0_RX_BUFFER_SIZE
Review Comment:
It was already used in xmc4_serial.c and xmc4_lowput.c.
But in my board I'm only using the USIC0_CHAN1 and it won't compile without
this changes.
Because it is used for CHAN1 offset definition but only defined if CHAN0 is
selected
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