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command: Prefer uint8_t* for buffers; prefer uint8_fast_t for lengths

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Prefer using 'uint8_t' buffers as it is too easy to run into C sign
extension problems with 'char' buffers.  Prefer using 'uint_fast8_t'
for buffer lengths as gcc does a better job compiling them on 32bit
mcus.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2018-05-24 12:49:23 -04:00
parent 2a55741ea8
commit cb4e165071
11 changed files with 71 additions and 78 deletions
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2
src/avr/main.c
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@ -54,7 +54,7 @@ DECL_INIT(prescaler_init);
// Optimized crc16_ccitt for the avr processor
uint16_t
crc16_ccitt(char *buf, uint8_t len)
crc16_ccitt(uint8_t *buf, uint_fast8_t len)
{
uint16_t crc = 0xFFFF;
while (len--)

7
src/avr/usbserial.c
View file

@ -10,8 +10,7 @@
#include "command.h" // command_dispatch
#include "sched.h" // DECL_INIT
static char receive_buf[MESSAGE_MAX];
static uint8_t receive_pos;
static uint8_t receive_buf[MESSAGE_MAX], receive_pos;
void
usbserial_init(void)
@ -51,7 +50,7 @@ void
console_task(void)
{
console_check_input();
uint8_t pop_count;
uint_fast8_t pop_count;
int8_t ret = command_find_block(receive_buf, receive_pos, &pop_count);
if (ret > 0)
command_dispatch(receive_buf, pop_count);
@ -65,7 +64,7 @@ void
console_sendf(const struct command_encoder *ce, va_list args)
{
// Generate message
static char buf[MESSAGE_MAX];
static uint8_t buf[MESSAGE_MAX];
uint8_t msglen = command_encodef(buf, ce, args);
command_add_frame(buf, msglen);