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Implement new ds18b20 APIs

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This commit is contained in:
Alex Stewart 2016-03-17 16:03:46 -07:00
parent 60e468bdb2
commit 494c2d9cec
4 changed files with 311 additions and 46 deletions
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20
examples/ds18b20_broadcaster/ds18b20_broadcaster.c
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@ -19,15 +19,14 @@
// DS18B20 driver
#include "ds18b20/ds18b20.h"
// Onewire init
#include "onewire/onewire.h"
void broadcast_temperature(void *pvParameters)
{
uint8_t amount = 0;
uint8_t sensors = 2;
ds_sensor_t t[sensors];
uint8_t sensors = 1;
ds18b20_addr_t addrs[sensors];
float results[sensors];
// Use GPIO 13 as one wire pin.
uint8_t GPIO_FOR_ONE_WIRE = 13;
@ -36,8 +35,6 @@ void broadcast_temperature(void *pvParameters)
// Broadcaster part
err_t err;
// Initialize one wire bus.
onewire_init(GPIO_FOR_ONE_WIRE);
while(1) {
@ -66,18 +63,17 @@ void broadcast_temperature(void *pvParameters)
for(;;) {
// Search all DS18B20, return its amount and feed 't' structure with result data.
amount = ds18b20_read_all(GPIO_FOR_ONE_WIRE, t);
amount = ds18b20_scan_devices(GPIO_FOR_ONE_WIRE, addrs, sensors);
if (amount < sensors){
printf("Something is wrong, I expect to see %d sensors \nbut just %d was detected!\n", sensors, amount);
}
for (int i = 0; i < amount; ++i)
ds18b20_measure_and_read_multi(GPIO_FOR_ONE_WIRE, addrs, sensors, results);
for (int i = 0; i < sensors; ++i)
{
int intpart = (int)t[i].value;
int fraction = (int)((t[i].value - intpart) * 100);
// Multiple "" here is just to satisfy compiler and don`t raise 'hex escape sequence out of range' warning.
sprintf(msg, "Sensor %d report: %d.%02d ""\xC2""\xB0""C\n",t[i].id, intpart, fraction);
// ("\xC2\xB0" is the degree character (U+00B0) in UTF-8)
sprintf(msg, "Sensor %08x%08x reports: %f \xC2\xB0""C\n", (uint32_t)(addrs[i] >> 32), (uint32_t)addrs[i], results[i]);
printf("%s", msg);
struct netbuf* buf = netbuf_new();