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Added QFN20 package check for status LEDs GPIO configs in ext/badge/cp2102.c #40

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Added QFN20 package check for status LEDs GPIO configs in ext/badge/cp2102.c #40

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12 changes: 8 additions & 4 deletions ext/badge/cp2102.c
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Original file line number Diff line number Diff line change
Expand Up @@ -444,13 +444,17 @@ main (int argc, char * argv[])
if (gpio != NULL) {
p = (uint8_t *)&config;
if (strcmp (gpio, "on") == 0) {
p[CP2102N_MODE_RESET_P1] |= CP2102N_MODE_GPIO0 |
CP2102N_MODE_GPIO1;
// [CP210N Datasheet](https://www.silabs.com/documents/public/data-sheets/cp2102n-datasheet.pdf)
// NOTE: As visible from Figure 5.3 and Table 5.3 (in the datasheet), the QFN20 package uses
// GPIO.2/TXT and GPIO.3/RXT, as opposed to GPIO.0/TXT and GPIO.1/RXT, respectively, for the other
// two packages (i.e., QFN28 and QFN24). So here we need to check whether we are dealing with QFN20, and,
// if so, adjust the target bits accordingly.
p[CP2102N_MODE_RESET_P1] |= ((part != CP210X_PROD_CP2102N_QFN20) ? (CP2102N_MODE_GPIO0 | CP2102N_MODE_GPIO1) : (CP2102N_MODE_GPIO2 | CP2102N_MODE_GPIO3));
p[CP2102N_PORTSET] |= CP2102N_PORTSET_TXLED |
CP2102N_PORTSET_RXLED;
} else if (strcmp (gpio, "off") == 0) {
p[CP2102N_MODE_RESET_P1] &= ~(CP2102N_MODE_GPIO0 |
CP2102N_MODE_GPIO1);
// NOTE: same note as above "if" block regarding QFN20 package and TX/RX GPIOs.
p[CP2102N_MODE_RESET_P1] &= ~((part != CP210X_PROD_CP2102N_QFN20) ? (CP2102N_MODE_GPIO0 | CP2102N_MODE_GPIO1) : (CP2102N_MODE_GPIO2 | CP2102N_MODE_GPIO3));
p[CP2102N_PORTSET] &= ~(CP2102N_PORTSET_TXLED |
CP2102N_PORTSET_RXLED);
} else {
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