msp430x23x0_tb_15.c

MSP430的开发程序的例子+中文注释

//******************************************************************************
//   MSP430F23x0 Demo - Timer_B, PWM TB1-2, Up/Down Mode, HF XTAL ACLK
//
//   Description: This program generates two PWM outputs on P4.1,2 using
//   Timer_B configured for up/down mode. The value in TBCCR0, 128, defines
//   the PWM period/2 and the values in TBCCR1-2 the PWM duty cycles. Using
//   HF XTAL ACLK as TBCLK, the timer period is HF XTAL/256 with a 75%
//   duty cycle on P4.1 and 25% on P4.2.
//   ACLK = MCLK = TBCLK = HF XTAL
//   //* HF XTAL REQUIRED AND NOT INSTALLED ON FET *//
//   //* Min Vcc required varies with MCLK frequency - refer to datasheet *//
//
//                MSP430F23x0
//             -----------------
//         /|\|              XIN|-
//          | |                 | HF XTAL (3