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Code for measuring the signal with a specified length and sampling rate, and saving it on a SD card.
Diff: savePower.cpp
- Revision:
- 0:c05b00be2229
diff -r 000000000000 -r c05b00be2229 savePower.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/savePower.cpp Thu Jul 13 19:33:37 2017 +0000 @@ -0,0 +1,61 @@ +#include "mbed.h" +#include "sdram.h" +#include "savePower.h" + +static int phy_write(unsigned int PhyReg, unsigned short Data) +{ + unsigned int timeOut; + + LPC_EMAC->MADR = DP83848C_DEF_ADR | PhyReg; + LPC_EMAC->MWTD = Data; + + for(timeOut = 0; timeOut < MII_WR_TOUT; timeOut++) { /* Wait until operation completed */ + if((LPC_EMAC->MIND & MIND_BUSY) == 0) { + return 0; + } + } + + return -1; +} + +DigitalOut cke(P2_24); +Ethernet eth; +DigitalOut p1_19(P1_19); +DigitalOut p2_18(P2_18); + + +void savePower(void) +{ + /* + -------------------------------------------------------> + Initialize SDRAM and set CKE 0 to make sure SDRAM is + in power-down mode. CKE is also connected to a 1K5 pull + down resistor + */ + // DigitalOut cke(P2_24); + sdram_init(); + cke = 0; // set low not to draw any current + + /* -------------------------------------------------------> + Initialize Ethernet by instantiating the Ethernet class + The Ethernet interface doesn't contain a power-down + method so we reimplement phy_write in this app and + puts the PHY in power-down here + */ + // Ethernet eth; + + phy_write(PHY_REG_BMCR, PHY_BMCR_PWR_DOWN); + + /*<------------------------------------------------------- + must be low to disable U7 (STMPS2171STR) + DigitalOut p1_19(P1_19); + */ + p1_19 = 0; + + + /* p2.18 connected to 1K5 pull-down resistor + DigitalOut p2_18(P2_18); + */ + p2_18 = 0; + +} \ No newline at end of file