mirror/tinyusb
1
0
Fork 0
mirror of https://github.com/hathach/tinyusb.git synced 2025-03-21 16:20:46 +00:00
Code Issues Packages Projects Releases Wiki Activity

tested with 9V request

Browse Source
This commit is contained in:
hathach 2023-06-12 17:01:54 +07:00
parent 6941a5af81
commit 7a1179a4e1
No known key found for this signature in database
GPG Key ID: F5D50C6D51D17CBA
1 changed files with 22 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
examples/typec/power_delivery/src/main.c
View File

@ -34,6 +34,13 @@
// MACRO CONSTANT TYPEDEF PROTOTYPES
//--------------------------------------------------------------------+
// Voltage and current for selecting PDO
// DANGEROUS: Please make sure your board can withstand the voltage and current
// defined here. Otherwise, you may damage your board, smoke can come out
#define VOLTAGE_MAX_MV 5000 // maximum voltage in mV
#define CURRENT_MAX_MA 500 // maximum current in mA
#define CURRENT_OPERATING_MA 100 // operating current in mA
/* Blink pattern
* - 250 ms : button is not pressed
* - 1000 ms : button is pressed (and hold)
@ -83,7 +90,7 @@ bool tuc_pd_data_received_cb(uint8_t rhport, pd_header_t const* header, uint8_t
case PD_DATA_SOURCE_CAP: {
printf("PD Source Capabilities\r\n");
// Examine source capability and select a suitable PDO (starting from 1 with safe5v)
uint8_t obj_pos = 1;
uint8_t selected_pos = 1;
for(size_t i=0; i<header->n_data_obj; i++) {
TU_VERIFY(dobj < p_end);
@ -92,7 +99,15 @@ bool tuc_pd_data_received_cb(uint8_t rhport, pd_header_t const* header, uint8_t
switch ((pdo >> 30) & 0x03ul) {
case PD_PDO_TYPE_FIXED: {
pd_pdo_fixed_t const* fixed = (pd_pdo_fixed_t const*) &pdo;
printf("[Fixed] %u mV %u mA\r\n", fixed->voltage_50mv*50, fixed->current_max_10ma*10);
uint32_t const voltage_mv = fixed->voltage_50mv*50;
uint32_t const current_ma = fixed->current_max_10ma*10;
printf("[Fixed] %lu mV %lu mA\r\n", voltage_mv, current_ma);
if (voltage_mv <= VOLTAGE_MAX_MV && current_ma >= CURRENT_MAX_MA) {
// Found a suitable PDO
selected_pos = i+1;
}
break;
}
@ -110,7 +125,10 @@ bool tuc_pd_data_received_cb(uint8_t rhport, pd_header_t const* header, uint8_t
}
//------------- Response with selected PDO -------------//
// Be careful and make sure your board can withstand the selected PDO voltage other than safe5v e.g 12v or 20v
// Be careful and make sure your board can withstand the selected PDO
// voltage other than safe5v e.g 12v or 20v
printf("Selected PDO %u\r\n", selected_pos);
// Send request with selected PDO position as response to Source Cap
pd_rdo_fixed_variable_t rdo = {
@ -123,9 +141,8 @@ bool tuc_pd_data_received_cb(uint8_t rhport, pd_header_t const* header, uint8_t
.usb_comm_capable = 1,
.capability_mismatch = 0,
.give_back_flag = 0, // exteremum is max
.object_position = obj_pos,
.object_position = selected_pos,
};
tuc_msg_request(rhport, &rdo);
break;