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Guys, just to let you know, the reason why I was asking questions before about the SCI, and how everyone was telling me to read the manual, On the cd, there was no section on the SCI, just the SPI!!! Thats why I was getting confused. I looked at freescale, and found a document which described the SCI well, so im reading up on that. Ive gathered that SPI0 is used for RS232 connection to the pc, but if I want to use SCI1, I can use either the 4 pin or 2 pin connector, yes? Ive hooked up to the 2 pin connector, but im not getting anything going through, yet my code seems fine. Am I using the right pins? I noticed on the other 100 pins (come out on the E128 development board with 2 small breadboards) There are pins 34/RXD1&32TXD1, and 32RXD2$31TXD1. do I use these instead? The documentation doesnt give a good explaination of which pins are for the SCI, and since im new to using the SCI apart from loading code on my comp....... It seems right using the 2 pins I mentioned earlier next to the 4 pins RS232 and the SCI0, but im just not getting anything going there. does the register SCI1DRL and whatever data is in it automatically go to these pins, once everything is initialised properly?

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On H1 header of Adapt9S12E128 are TXD1 (pin 32) and RXD1 (pin 34) for use as SCI1. It is also connected to MAX3232 (voltage tranlator) via jumper selection JB8. If the RF module requires TTL signal then use Pin 32 and 34. If it requires RS232 signal then use the 4 pin molex connector J2. Make sure to check your connections are correct when you are making up the cable and to include ground. On H2 are TXD2 (pin 31) and RXD2 (pin 32). This is the SCI2 and the pins are TTL signal only. Exequiel --- In , "gogosgeorge" <ggogos@b...> wrote: > > Guys, > > just to let you know, the reason why I was asking questions before > about the SCI, and how everyone was telling me to read the manual, > On the cd, there was no section on the SCI, just the SPI!!! Thats > why I was getting confused. I looked at freescale, and found a > document which described the SCI well, so im reading up on that. > > Ive gathered that SPI0 is used for RS232 connection to the pc, but > if I want to use SCI1, I can use either the 4 pin or 2 pin > connector, yes? Ive hooked up to the 2 pin connector, but im not > getting anything going through, yet my code seems fine. Am I using > the right pins? I noticed on the other 100 pins (come out on the > E128 development board with 2 small breadboards) There are pins > 34/RXD1&32TXD1, and 32RXD2$31TXD1. do I use these instead? The > documentation doesnt give a good explaination of which pins are for > the SCI, and since im new to using the SCI apart from loading code > on my comp....... > > It seems right using the 2 pins I mentioned earlier next to the 4 > pins RS232 and the SCI0, but im just not getting anything going > there. does the register SCI1DRL and whatever data is in it > automatically go to these pins, once everything is initialised > properly?

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What is JB8 (Max3232) used for? does it need to be connected here first and then to TXD1 and RXD1? George Gogos Undergraduate BACHELOR OF ENGINEERING(Computronics/Electronics) Deakin University, Australia ----- Original Message ----- From: zeta_alpha2002 To: Sent: Sunday, March 20, 2005 4:27 AM Subject: [68HC12] Re: using the SCI with my transceiver On H1 header of Adapt9S12E128 are TXD1 (pin 32) and RXD1 (pin 34) for use as SCI1. It is also connected to MAX3232 (voltage tranlator) via jumper selection JB8. If the RF module requires TTL signal then use Pin 32 and 34. If it requires RS232 signal then use the 4 pin molex connector J2. Make sure to check your connections are correct when you are making up the cable and to include ground. On H2 are TXD2 (pin 31) and RXD2 (pin 32). This is the SCI2 and the pins are TTL signal only. Exequiel --- In , "gogosgeorge" <ggogos@b...> wrote: > > Guys, > > just to let you know, the reason why I was asking questions before > about the SCI, and how everyone was telling me to read the manual, > On the cd, there was no section on the SCI, just the SPI!!! Thats > why I was getting confused. I looked at freescale, and found a > document which described the SCI well, so im reading up on that. > > Ive gathered that SPI0 is used for RS232 connection to the pc, but > if I want to use SCI1, I can use either the 4 pin or 2 pin > connector, yes? Ive hooked up to the 2 pin connector, but im not > getting anything going through, yet my code seems fine. Am I using > the right pins? I noticed on the other 100 pins (come out on the > E128 development board with 2 small breadboards) There are pins > 34/RXD1&32TXD1, and 32RXD2$31TXD1. do I use these instead? The > documentation doesnt give a good explaination of which pins are for > the SCI, and since im new to using the SCI apart from loading code > on my comp....... > > It seems right using the 2 pins I mentioned earlier next to the 4 > pins RS232 and the SCI0, but im just not getting anything going > there. does the register SCI1DRL and whatever data is in it > automatically go to these pins, once everything is initialised > properly? Yahoo! Groups Sponsor ADVERTISEMENT ------------------------------------------------------------------------------ Yahoo! Groups Links a.. To [Non-text portions of this message have been removed]

Re[2]: [68HC12] Re: using the SCI with my transceiver
Re: using the SCI with my transceiver


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Saturday, March 19, 2005, 5:39:02 PM, you wrote: GB> What is JB8 (Max3232) used for? does it need to be connected GB> here first and then to TXD1 and RXD1? Serial communications from a PC (or similar) use nominally +15/-15 volt signals. This needs to be level shifted in order to work with 0/5V or 0/3.3V boards. The MAX chip does this level shifting in both directions. You don't need it for your RF module most likely. I'd expect that it wants normal 0/5V or 0/3.3V signals. Aaron

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> What is JB8 (Max3232) used for? Look at the schematic diagram to tell you how it is connected. That will answer your question. >does it need to be connected here first and then to TXD1 and RXD1? The RF module, does it need TTL/CMOS signal or RS232 signal. The previous email has already answered the above question. --- In , "George \(Bigpond\)" <ggogos@b...> wrote: > What is JB8 (Max3232) used for? does it need to be connected here first and then to TXD1 and RXD1? > George Gogos > Undergraduate > BACHELOR OF ENGINEERING(Computronics/Electronics) > Deakin University, Australia > ----- Original Message ----- > From: zeta_alpha2002 > To: > Sent: Sunday, March 20, 2005 4:27 AM > Subject: [68HC12] Re: using the SCI with my transceiver > > On H1 header of Adapt9S12E128 are TXD1 (pin 32) and RXD1 (pin 34) for > use as SCI1. It is also connected to MAX3232 (voltage tranlator) via > jumper selection JB8. > > If the RF module requires TTL signal then use Pin 32 and 34. If it > requires RS232 signal then use the 4 pin molex connector J2. Make > sure to check your connections are correct when you are making up the > cable and to include ground. > > On H2 are TXD2 (pin 31) and RXD2 (pin 32). This is the SCI2 and the > pins are TTL signal only. > > Exequiel > --- In , "gogosgeorge" <ggogos@b...> wrote: > > > > Guys, > > > > just to let you know, the reason why I was asking questions before > > about the SCI, and how everyone was telling me to read the manual, > > On the cd, there was no section on the SCI, just the SPI!!! Thats > > why I was getting confused. I looked at freescale, and found a > > document which described the SCI well, so im reading up on that. > > > > Ive gathered that SPI0 is used for RS232 connection to the pc, but > > if I want to use SCI1, I can use either the 4 pin or 2 pin > > connector, yes? Ive hooked up to the 2 pin connector, but im not > > getting anything going through, yet my code seems fine. Am I using > > the right pins? I noticed on the other 100 pins (come out on the > > E128 development board with 2 small breadboards) There are pins > > 34/RXD1&32TXD1, and 32RXD2$31TXD1. do I use these instead? The > > documentation doesnt give a good explaination of which pins are for > > the SCI, and since im new to using the SCI apart from loading code > > on my comp....... > > > > It seems right using the 2 pins I mentioned earlier next to the 4 > > pins RS232 and the SCI0, but im just not getting anything going > > there. does the register SCI1DRL and whatever data is in it > > automatically go to these pins, once everything is initialised > > properly? > > > Yahoo! Groups Sponsor > ADVERTISEMENT > ------------------------------------------------------------------------------ > Yahoo! Groups Links > > a.. To > > [Non-text portions of this message have been removed]

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--- In , aaron <spamtest@s...> wrote: > Saturday, March 19, 2005, 5:39:02 PM, you wrote: > > GB> What is JB8 (Max3232) used for? does it need to be connected > GB> here first and then to TXD1 and RXD1? > > Serial communications from a PC (or similar) use nominally +15/-15 > volt signals. This needs to be level shifted in order to work with > 0/5V or 0/3.3V boards. The MAX chip does this level shifting in both > directions. Don't forget if you have +/-12V or so available three transitors will do the same as the Max a lot cheaper. Cheers, Theo

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The RF only needs ttl signals, so I guess ill be usin SCI1, with pins TXD1(32) & RXD1(34) true? George Gogos Undergraduate BACHELOR OF ENGINEERING(Computronics/Electronics) Deakin University, Australia ----- Original Message ----- From: theobee00 To: Sent: Sunday, March 20, 2005 5:17 PM Subject: [68HC12] Re: using the SCI with my transceiver --- In , aaron <spamtest@s...> wrote: > Saturday, March 19, 2005, 5:39:02 PM, you wrote: > > GB> What is JB8 (Max3232) used for? does it need to be connected > GB> here first and then to TXD1 and RXD1? > > Serial communications from a PC (or similar) use nominally +15/-15 > volt signals. This needs to be level shifted in order to work with > 0/5V or 0/3.3V boards. The MAX chip does this level shifting in both > directions. Don't forget if you have +/-12V or so available three transitors will do the same as the Max a lot cheaper. Cheers, Theo Yahoo! Groups Sponsor ADVERTISEMENT ------------------------------------------------------------------------------ Yahoo! Groups Links a.. To [Non-text portions of this message have been removed]

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