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feat(ex02): priority is now int16_t

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Maix0 2026-04-23 17:41:21 +02:00
parent 4b5b83edaa
commit 153f2b82d2
3 changed files with 25 additions and 6 deletions
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3
ex02/include/uart.h
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@ -12,6 +12,9 @@ void uart_send_u8(uint8_t val);
void uart_send_u16(uint16_t val);
void uart_send_u32(uint32_t val);
void uart_send_i16(int16_t val);
void uart_send_u8_hex(uint8_t val);
void uart_send_u16_hex(uint16_t val);

16
ex02/src/main.c
View file

@ -42,6 +42,7 @@ typedef struct command {
union cmd_type {
uint32_t u32;
uint16_t u16;
int16_t i16;
char c32[32];
} args;
} command;
@ -63,7 +64,7 @@ typedef struct node {
char magic[3]; // RED
char tag[33]; // BLUE
uint32_t id; // GREEN
uint16_t priority; // YELLOW
int16_t priority; // YELLOW
uint16_t crc; // PURPLE
} node;
@ -217,8 +218,11 @@ bool parse_command(char* str, command* cmd) {
return uart_sendstring("SET_PRIO failed space \r\n"), true;
while (str[i] == ' ')
i++;
uint16_t value = 0;
bool seen = false;
int32_t value = 0;
bool seen = false;
bool neg = false;
if (str[i] == '-')
(neg = true, i++);
for (; (str[i] >= '0' && str[i] <= '9'); i++) {
seen = true;
// overflow ? what is that ?!
@ -233,7 +237,7 @@ bool parse_command(char* str, command* cmd) {
}
cmd->ty = SET_PRIO;
cmd->args.u16 = value;
cmd->args.i16 = neg ? (int16_t)-value : (int16_t)value;
return false;
}
CMD_CHECK(str, "SET_TAG") {
@ -469,7 +473,7 @@ int main(void) {
uart_sendstring("Integrity check Good\r\n");
uart_sendstring("ID: "), uart_send_u32(node.id), uart_sendstring("\r\n");
uart_sendstring("Priority: "), uart_send_u16(node.priority),
uart_sendstring("Priority: "), uart_send_i16(node.priority),
uart_sendstring("\r\n");
uart_sendstring("TAG: \""), uart_sendstring(c), uart_sendstring("\"\r\n");
uart_sendstring("SLOT: "), uart_send_u8(current_slot), uart_sendstring("\r\n");
@ -486,7 +490,7 @@ int main(void) {
case SET_PRIO: {
if (!read_node(current_slot, &node))
init_default_node(&node);
node.priority = cmd.args.u16;
node.priority = cmd.args.i16;
node_set_crc(&node);
write_node_reallocating(&current_slot, &node);
break;

12
ex02/src/uart.c
View file

@ -88,6 +88,18 @@ void uart_send_u16(uint16_t val) {
uart_sendstring(buf);
}
void uart_send_i16(int16_t val) {
if (val == 0)
return uart_tx('0');
if (val == -32768)
return uart_sendstring("-32768");
if (val < 0) {
uart_tx('-');
val = -val;
}
uart_send_u16(val);
}
void uart_send_u32(uint32_t val) {
if (val == 0)
return uart_tx('0');