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USCI B2 initialization function is complete, along with enable & disable functions

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William Miceli
2021-07-30 21:29:45 -04:00
parent 4b3cfc1ca8
commit b6cecee8aa
2 changed files with 26 additions and 3 deletions
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20
Telem_Debug/Debug_RTC/usci.c
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@@ -147,15 +147,31 @@ void usci_B1_init(void){
/*************************************************************************/ /*************************************************************************/
void usci_B2_init(void){ void usci_B2_init(void){
UCB2CTL1 |= UCSWRST; // Software Reset Enable - Set high, disabling the USCI module; Changes to USCI configuration registers can only be made when the UCSWRST bit = 1 UCB2CTL1 |= UCSWRST; // Software Reset Enabled - Set high, disabling the USCI module; Changes to USCI configuration registers can only be made when the UCSWRST bit = 1
UCB2CTL0 &= ~UCA10; // Use 7-bit addressing mode for itself UCB2CTL0 &= ~UCA10; // Use 7-bit addressing mode for itself
UCB2CTL0 &= ~UCSLA10; // Use 7-bit addressing mode for slaves UCB2CTL0 &= ~UCSLA10; // Use 7-bit addressing mode for slaves
UCB2CTL0 &= ~UCMM; // Single-master environment only UCB2CTL0 &= ~UCMM; // Single-master environment only
UCB2CTL0 |= UCMST; // Master mode selected UCB2CTL0 |= UCMST; // Master mode selected
UCB2CTL0 |= UCMODE_3; // I2C mode selected for the USCI UCB2CTL0 |= UCMODE_3; // I2C mode selected for the USCI
UCB2CTL1 |= UCSSEL__SMCLK; // Use SMCLK as the USCi's clock source UCB2CTL0 |= UCSYNC; // Synchronous Mode Enabled
UCB2CTL1 |= UCSSEL__SMCLK; // SMCLK selected as clock source
UCB2CTL1 |= UCTR; // Set as Transmitter
UCB2CTL1 &= ~UCTXNACK; // Acknowledge normally, do not generate NACK
UCB2CTL1 &= ~UCTXSTP; // Do not generate STOP condition
UCB2CTL1 &= ~UCTXSTT; // Do not generate START condition
UCB2BRW = 25; // Prescaler for baud rate set to 25
} }
void usci_B2_enable(void){
UCB2CTL1 &= ~UCSWRST; // Software Reset Disabled - Set low, enabling the USCI module
}
void usci_B2_disable(void){
UCB2CTL1 |= UCSWRST; // Software Reset Enabled - Set high, disabling the USCI module
}
/*************************************************************************/ /*************************************************************************/
/******************************** USCI B3 ********************************/ /******************************** USCI B3 ********************************/
/*************************************************************************/ /*************************************************************************/

9
Telem_Debug/Debug_RTC/usci.h
View File

@@ -20,7 +20,7 @@ void usci_A1_init(void);
* USCI A2 Initialization [UART Mode] * USCI A2 Initialization [UART Mode]
* *
* The FTDI FT230XS-R that was selected can handle up to 3 Mbaud, so we'll target 1 Mbaud * The FTDI FT230XS-R that was selected can handle up to 3 Mbaud, so we'll target 1 Mbaud
* The SMCLK is currently at 10 MHz * The SMCLK is currently set to 10 MHz
* *
* Using the "MSP430 USCI/EUSCI UART Baud Rate Calculation" tool at: * Using the "MSP430 USCI/EUSCI UART Baud Rate Calculation" tool at:
* http://software-dl.ti.com/msp430/msp430_public_sw/mcu/msp430/MSP430BaudRateConverter/index.html * http://software-dl.ti.com/msp430/msp430_public_sw/mcu/msp430/MSP430BaudRateConverter/index.html
@@ -59,9 +59,16 @@ void usci_B1_init(void);
* *
* The Microchip Technology MCP7940M supports up to 400 kHz I2C communication. * The Microchip Technology MCP7940M supports up to 400 kHz I2C communication.
* *
* The SMCLK is currently set to 10 MHz
* 10 MHz / 25 = 400 kHz
* Therefore, the prescaler needs to be set to 25
*/ */
void usci_B2_init(void); void usci_B2_init(void);
void usci_B2_enable(void);
void usci_B2_disable(void);
void usci_B3_init(void); void usci_B3_init(void);
#endif /* USCI_H_ */ #endif /* USCI_H_ */