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Fix USART total bytes waiting when tx/rx buffer sizes are not equal.

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Avoid using % operator.  Allow buffer sizes that are not powers of two.
This commit is contained in:
Dominic Clifton 2014-12-13 02:46:13 +00:00
parent 27ae6fdb72
commit 9b81dea320
2 changed files with 21 additions and 10 deletions
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3
src/main/drivers/serial_uart.h
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@ -17,8 +17,7 @@
#pragma once
// FIXME since serial ports can be used for any function these buffer sizes probably need normalising.
// Code is optimal when buffer sizes are powers of 2 due to use of % and / operators.
// Since serial ports can be used for any function these buffer sizes probably need normalising.
#define UART1_RX_BUFFER_SIZE 256
#define UART1_TX_BUFFER_SIZE 192
#define UART2_RX_BUFFER_SIZE 256