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ble server: added read callback, and value length checks

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This commit is contained in:
mila@ringwald.ch 2014-07-04 14:43:42 +00:00
parent d2c93e6f94
commit ff8c64ca60
1 changed files with 79 additions and 6 deletions
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85
MSP-EXP430F5438-CC256x/example-ble/ble_server.c
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@ -77,6 +77,11 @@
#define FONT_HEIGHT 12 // Each character has 13 lines
#define FONT_WIDTH 8
uint16_t chr01_value_length = 0;
uint16_t max_chr01_value_length = 40;
char chr01_value[max_chr01_value_length];
char chr02_value = 0;
void doLCD(void){
//Initialize LCD and backlight
// 138 x 110, 4-level grayscale pixels.
@ -159,22 +164,90 @@ static void app_packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *
// test profile
#include "profile.h"
static uint16_t get_read_att_value_len(uint16_t att_handle){
uint16_t value_len;
switch(att_handle){
case ATT_CHARACTERISTIC_FFF1_01_HANDLE:
value_len = chr01_value_length;
break;
case ATT_CHARACTERISTIC_FFF2_01_VALUE_HANDLE:
value_len = 1;
break;
default:
value_len = 0;
break;
}
return value_len;
}
static uint16_t get_write_att_value_len(uint16_t att_handle){
uint16_t value_len;
switch(att_handle){
case ATT_CHARACTERISTIC_FFF1_01_HANDLE:
value_len = max_chr01_value_length;
break;
case ATT_CHARACTERISTIC_FFF2_01_VALUE_HANDLE:
value_len = 1;
break;
default:
value_len = 0;
break;
}
return value_len;
}
uint16_t att_read_callback(uint16_t con_handle, uint16_t att_handle, uint16_t offset, uint8_t * buffer, uint16_t buffer_size){
printf("READ Callback, handle %04x\n", att_handle);
uint16_t value_len = get_att_read_value_len(att_handle);
if (!buffer) return value_len;
if (value_len <= offset ) return 0;
uint16_t bytes_to_copy = value_len - offset;
if (bytes_to_copy > buffer_size) {
bytes_to_copy = buffer-size;
}
switch(att_handle){
case ATT_CHARACTERISTIC_FFF1_01_HANDLE:
memcpy(buffer, &chr01_value[offset], bytes_to_copy);
break;
case ATT_CHARACTERISTIC_FFF2_01_VALUE_HANDLE:
buffer[offset] = chr02_value;
break;
}
return bytes_to_copy;
}
// write requests
static int att_write_callback(uint16_t con_handle, uint16_t att_handle, uint16_t transaction_mode, uint16_t offset, uint8_t *buffer, uint16_t buffer_size){
printf("WRITE Callback, handle %04x\n", handle);
switch(handle){
case ATT_CHARACTERISTIC_FFF1_01_VALUE_HANDLE:
buffer[buffer_size]=0;
printf("WRITE Callback, handle %04x\n", att_handle);
uint16_t value_len = get_write_att_value_len(att_handle);
if (value_len <= offset ) return ATT_ERROR_INVALID_OFFSET;
uint16_t bytes_to_copy = value_len - offset;
if (bytes_to_copy > buffer_size) {
bytes_to_copy = buffer-size;
}
switch(att_handle){
case ATT_CHARACTERISTIC_FFF1_01_HANDLE:
buffer[buffer_size] = 0;
memcpy(&chr01_value[offset], buffer, bytes_to_copy);
chr01_value_length = bytes_to_copy + offset;
printf("New text: %s\n", buffer);
overwriteLine(7, (char*)buffer);
break;
case ATT_CHARACTERISTIC_FFF2_01_VALUE_HANDLE:
printf("New value: %u\n", buffer[0]);
if (buffer[0]){
printf("New value: %u\n", buffer[offset]);
if (buffer[offset])
LED_PORT_OUT |= LED_2;
} else {
LED_PORT_OUT &= ~LED_2;
}
chr02_value = buffer[offset];
break;
}
return 0;