diff options
Diffstat (limited to 'examples/typec')
| -rw-r--r-- | examples/typec/power_delivery/src/main.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/examples/typec/power_delivery/src/main.c b/examples/typec/power_delivery/src/main.c index 42665ed1b..342a2235f 100644 --- a/examples/typec/power_delivery/src/main.c +++ b/examples/typec/power_delivery/src/main.c @@ -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; |