specchioriflesso/USB_Host_Shield_2.0
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Merge pull request #419 from riban-bw/GPI_Output_Read

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Fixes #417 - adds function gpioRdOutput to read output pins.
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Kristian Sloth Lauszus 2018-10-14 22:23:11 +02:00 committed by GitHub
commit 497d6ebd7e
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1 changed files with 17 additions and 0 deletions
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usbhost.h
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@ -140,6 +140,7 @@ public:
uint8_t regRd(uint8_t reg);
uint8_t* bytesRd(uint8_t reg, uint8_t nbytes, uint8_t* data_p);
uint8_t gpioRd();
uint8_t gpioRdOutput();
uint16_t reset();
int8_t Init();
int8_t Init(int mseconds);
@ -379,6 +380,9 @@ uint8_t* MAX3421e< SPI_SS, INTR >::bytesRd(uint8_t reg, uint8_t nbytes, uint8_t*
}
/* GPIO read. See gpioWr for explanation */
/** @brief Reads the current GPI input values
* @retval uint8_t Bitwise value of all 8 GPI inputs
*/
/* GPIN pins are in high nibbles of IOPINS1, IOPINS2 */
template< typename SPI_SS, typename INTR >
uint8_t MAX3421e< SPI_SS, INTR >::gpioRd() {
@ -389,6 +393,19 @@ uint8_t MAX3421e< SPI_SS, INTR >::gpioRd() {
return ( gpin);
}
/** @brief Reads the current GPI output values
* @retval uint8_t Bitwise value of all 8 GPI outputs
*/
/* GPOUT pins are in low nibbles of IOPINS1, IOPINS2 */
template< typename SPI_SS, typename INTR >
uint8_t MAX3421e< SPI_SS, INTR >::gpioRdOutput() {
uint8_t gpout = 0;
gpout = regRd(rIOPINS1); //pins 0-3
gpout &= 0x0f; //clean upper nibble
gpout |= (regRd(rIOPINS2) << 4); //shift high bits and OR with lower from previous operation.
return ( gpout);
}
/* reset MAX3421E. Returns number of cycles it took for PLL to stabilize after reset
or zero if PLL haven't stabilized in 65535 cycles */
template< typename SPI_SS, typename INTR >